1, covered with grass pasture

 Daily uniform growth, this piece of grass to eat for 20 days for 10 cows, 15 cows to eat for 10 days. 25 days for cattle to eat?

2, a pasture grass every day uniform growth. This piece of grass to eat for 6 weeks, 27 cows, 23 head of cattle to eat or for 9 weeks. 21 weeks for cattle to eat it?

3, a pasture for 24 head of cattle to eat for 6 weeks, 20 cows eat 10 weeks, this piece of pasture for 18 cows to eat a few weeks?

4, there is a water well, spring water continue to gush, gush of water per minute equal. If you use three pumps to pump water, 36 minutes for smoked, if you use 5 pumps to pump water, for 20 minutes can be smoked. Now to be smoked within 12 minutes of well water, you need to pump the number of aircraft?

5, there is a pool, the bottom has been pouring spring water. To drain the pool of water, such as pump 10 to be drawn with 8 hours; as required by 8 pumps pumping 12 hours. So, if using 6 sets of pumps, pumping required number of hours?

6, there is a grassy pasture, uniform growth of grass every day. 17 cows to eat the ranch for 30 days, 24 days for 19 cows to eat. The current number of heads in the grazing cattle, 6 days later, killed 4 cattle, the cattle ate the remaining 2 days will be eating grass. Asked how many had a cow head?

7, has 3 pastures covered with grass, the first farm of 33 acres, 22 cows to eat for 54 days; the second pasture, 28 acres, 17 head of cattle to eat for 84 days, and the third Ranch 40 acres, the number of cattle to eat for 24 days? (Per plot per acre of grass are the same and uniform growth)

8, there is a farm, 24 cows eat grass can be 6 days, 8 days or 21 head of cattle can eat. To never eat grass, up to a few cattle grazing?

9, anti-drug exhibition opened at 8, but some people lined up early admission. The audience from the first arrival, the number of people per minute to as much as the audience. If the opening three entry ports, 8:09 to no people queuing; 5 admission if the open mouth, 8:05 no one line up. The first visitors arrived, how many minutes from 8:00?

1. A pasture, the same day, the rate of growth. Now this piece of pasture for 20 head of cattle to eat for 12 days or 24 days for 60 sheep to eat. If a cow grazing sheep graze the amount of volume equal to 4, then 12 cattle and 88 sheep to eat can eat how many days?

2. A pool, pool with water pouring evenly. If full of water drained, with 10 pumps 2 hours, with the same pump 5 takes 7 hours, is now in full within half an hour to drain the water, at least how many such pumps?

3. A grass, 20 days for 8 sheep to eat, or eat for 10 days for the 14 sheep. Assuming the same growth rate of grass every day. Only the existing number of sheep,Discount UGG boots, eating the 4 days were added to 6, so they put the grass to eat 2 days after eating, and asked how many sheep?

4.12 cows four weeks eating 6 hectares of pasture, 20 head of cattle 6 weeks after eating 12 hectares of pasture. Assuming equal amount per hectare of old grass, grass growth rate unchanged. Q. After 8 weeks the number of cows 16 ha of pasture?

5. A, B, C from A to three cars at the same time starting 6 minutes after starting a car over a long distance runner, after 2 minutes after the B super cars passed, and after a 2 minute C cars over the past . A car known to go 1000 meters per minute, B car to go 800 meters per minute, find the speed of C cars.

1, there is a grass pasture, 27 head of cattle to eat for 6 weeks, or for 23 cattle to eat for 9 weeks. If the uniform growth of grass per week, for 21 cows to eat a few weeks?

2, there is a well, if the water level decreased continuously and evenly pouring water, and to a certain level no longer increased. Water is now hanging in water, if the 4 barrels per minute hanging, then 15 minutes to hang dry, if you hang 8 barrels per minute, then 7 points hang dry. 5 minutes is now hanging dry, the number of barrels of water per minute should be suspended?

3, there is a grass, a uniform rate of growth per day, sending 17 people to cut grass now, 30 days to the grass all mown, if you send 19 people to mow, you will be able to cut 24 days End. If you need 6 days mown, need to send many people to cut grass?

4, a barrel of wine barrels every day because of cracks have to miss the same amount of wine, now that a barrel of wine to drink if given 6 and 4 days to finish; if the 4 people drink, 5 days to finish. This barrel of wine for every day missed a few people to drink wine a day?

5, a certain quantity of water inventory, water storage evenly. 5 drain pump for 20 days; 6 sets of the same pumps can be drained 15 consecutive days. 6 days to drain, how many units the same pump?

1, due to the weather getting cold, the grass pasture to a uniform rate of decrease per day. After calculation, the grass pasture for 20 head of cattle to eat 5 days, or 16 head of cattle to eat for 6 days. So, for 11 cows to eat a few days?

2, there is a pool, the bottom has been pouring spring water. To drain the pool of water, 10 water pumps to be pumping 8, 8 pumps to be pumping 12. If you use 6 sets of pumps, then the required number of hours of pumping?

3, there is a pool, an open bottom outlet. 20 hours with 5 pumps the water can be smoked, with 8 pumps water 15 hours can be smoked. If the outlet water alone, then how long the water can drain all?

4, escalators running from bottom to top in uniform, two impatient kids too escalator slowly, so in a moving escalator, the boys go up one step per second, the girl every 3 seconds take 2 steps. Results with 50 seconds to reach the boy upstairs, the girl with 60 seconds to reach upstairs. The total number of level escalator?

5, a station at the ticket several minutes before the start line, the number of visitors per minute to as much. Ticket from the beginning to the waiting team ticket disappear, if the same wicket is open 5 to 30 minutes, if the same is open six wicket 20 minutes. If you make the team for 10 minutes gone, then you need some ticket gates open at the same time?

1, pasture covered with grass, uniform growth of grass every day, this piece of pasture for 10 cows eat 20 days for 15 cows to eat for 10 days. Asked for 25 cows to eat a few days?

2, art exhibition open at 9, but already people queuing admission. When the audience came with the first, the number of visitors per minute to as much. If the opening three entry ports, it is no longer 9 minutes after people queuing; 5 admission if the open mouth, then 5 minutes after no more queuing. Then the first time is the arrival time of the audience a bit?

3, a pasture, cows eat 12 for 9 days, 8 head of cattle are also available to eat for 16 days. Now only 4 cows to eat, from the 7th day of added a number of cattle to graze, eat 6 days after eating all the grass. Question from 7 days from the increased number of cattle (uniform growth of grass every day, the amount of grazing per cow per day equal)?

4, a pasture, 16 head of cattle to eat for 20 days, are also available for 80 sheep to eat for 12 days if the daily volume is equal to 1 day grazing cattle grazing sheep the amount of 4 , then 10 cattle and 60 sheep to eat the piece of grass, and asked a few days to finish this piece of grass (the same rate of growth of forage per day, per sheep per head of cattle graze every day the same amount)?

5, brother, move up the escalator down from the top down to go in the end, a total of 100 left the same time, my sister down the escalator walk from the bottom up top, left a total of 50 . If the brother unit of time is the sister series to go 2 times. Then when the stationary escalators, escalators can see how much some class?

1,cheap UGG boots, there is a grass pasture, 27 head of cattle can eat for 6 days, 9 days for 23 cows to eat, and if the same daily rate of grass growth, then this can be for 21 cows to eat grass A few days?

2, a ship that leaks, it is already into some water, the water evenly into the boat, if 10 people scoop water, 3 hours to complete scoop; if 5 people scoop water, 8 hours to scoop water After two hours if required to scoop, then how many people to arrange bail?

3, a pasture grass, if cut by 17 to 30 days can be cut to do, if 19 people go with the cutting, can cut as long as 24 days to do, ask how many people use the cut, 6 Days can be cut to do? (Uniform grass growth, mowing the same amount per person per day)

4, there is a spring, with the same power to the pumping well water pump 3 sets, while the boot, 40 minutes to drain; with the same 6 sets of pumps to smoke, only takes 16 minutes to drain, then 9 units with the same pump, a few minutes to drain?

5, there is a grass, the same day, the rate of growth, known this for 15 cows to eat grass for 20 days, or 76 sheep to eat for 12 days, if the amount is equal to a cow grazing 4, the amount of grazing sheep, then the 8 cattle and 64 sheep to eat, how many days you can eat?

6, a pool drain equipped with a displacement of an equal number of roots, an inlet pipe to the pool water continuously, the average amount of water per minute into the same, if both open three pipes, 45 minutes water drained into the pool; the same time, open five to 25 minutes, drain the water drained the pool, then, while opening eight drainage, the pool drained of water a few minutes?

Example eleven grass, grass grow uniform every day, this piece of grass to eat for 6 weeks or 27 head of cattle 23 head of cattle to eat nine weeks, then this piece of grass for cattle to eat a few 21 weeks?

a grass pasture, grass all day, uniform growth. This pasture for 10 cows to eat for 20 days, or 15 head of cattle to eat for 10 days, and asked for 25 cows to eat a few days?

2, a meadow grass grow every day uniform. If you eat 6 days for 24 cows or 20 cows to eat for 10 days after eating. Then a few days for 19 cows to eat? Example II

cold weather gradually up the grass on the ranch not only long and more, but at a fixed rate on the decline, according to this calculation, a grass pasture for 20 cows to eat grass for 5 days 15 head of cattle to eat or for 6 days, then the number of cattle to eat for 10 days?

1, due to the weather getting cold, the grass pasture to a fixed rate of decrease. Known for pasture 33 head of cattle to eat grass for 5 days or 6 days for 24 cows to eat. On this basis, the number of cows to eat the ranch for 10 days?

2, getting cold, the grass pasture to a uniform rate of decrease per day. After calculation, the grass pasture for 20 head of cattle to eat for 5 days or 6 days for 16 cows to eat. Then a few days for 11 cows to eat?

Example three escalators at a uniform rate of travel was from bottom to top, two impatient children from the escalator upstairs, the boy known to walk 20 steps per minute, the girl to walk 15 steps per minute, the results of boys 5 minutes to reach the upstairs, the girl upstairs with a 6 minutes. Asked how many steps of the escalator?

1, the two naughty children to walk upstream along the direction of the escalator, in 20 seconds, the boy can take 27 steps, the girl can walk 24 steps, the boy walked to the other side for 2 minutes, the girl 3 minutes walk to the other side, the number of steps of the escalator?

2, escalators to the speed of the uniform, Xiao Ming and red from the escalator upstairs. Xiao Ming is known to go 25 steps per minute, the little red walk 20 steps per minute, the result Xiaoming of 5 minutes, 6 minutes red, reached with the upstairs. The total number of steps the escalator? Example forty-one ship

a loophole to enter the water at a uniform speed of the cabin, found loopholes have been into some water, if you scoop water with 12 people, 3 hours scoop finished. If only 5 people scoop water, scoop take 10 hours to complete. After 2 hours in order to scoop now water, how many people?

Active Learning:

1, a ship that leaks, it is already into some water, the water evenly into the boat now, if 10 people scouring the water for 3 hours can be mined End; 5 8 hours were Amoy Amoy End of water. After 2 hours scouring if required, to arrange how many people scouring the water?

2, there is a rectangular tank, above a water hole, the bottom has a water hole, two holes opened at the same time, if 30 cubic meters of water per hour, 7 hours to fill the water tank; if the hourly 45 cubic water, fill the water tank can be less 2.5 hours. So how much per hour cubic meters of water from the bottom hole? (The same displacement per hour)

3, a pool, pool with spring water continuously pouring, with 10 to 20 hours to pump the water drained, with 15 pumps the same 10 hours to drain the water . Then there is 25 the number of hours that can pump water out?

five examples have three grassland area of 5 hectares, 6 hectares and 8 hectares. Grass lawn thick and long as fast. The first piece of grass to eat for 10 days for 11 cows, the second block of 12 cows to eat grass for 14 days. Asked the third block of 19 cows to eat grass for many days?

Active Learning:

1, fast, medium and slow while the three vehicles starting from A to catch up with a running bike, the speed of the three cars were 24 km per hour , 20 km, 19 km. Express bike took 6 hours to catch up, catch up with bikes in the car for 10 hours, slow to catch up with the number of hours of bike?

six examples of a train station ticket gate, the ticket line before the commencement of some people, ticket every minute after the start of 10 people came to queue ticket, and a wicket every 25 minutes to make check-stop If only one wicket, wicket began 8 minutes after no one in line; if there are two ticket gates, then no one how many minutes after the ticket queue?

Active Learning:

1, a station at the ticket several minutes before the start line,UGG boots cheap, the number of visitors per minute to as much. Ticket ticket from the beginning to wait for the team disappeared, while opening four wicket 30 minutes, while opening five wicket 20 minutes. If the wicket open at 7, then take the number of minutes? Example eleven

grassy pastures, daily uniform growth, this piece of pasture for 5 cows eat 8 days, 2 days for 14 cows to eat, and asked for 10 cows to eat a few days?

Active Learning:

1, there is a pasture full of grass, every day uniform grass growth. 17 cows to eat the ranch for 30 days, 24 days for 19 cows to eat. The current number of head cattle grazing, 6 days, 4 cattle died, the remaining 2 days will eat cow eat grass. How many heads that there are cows? 2. There is a pastoral area covered with grass, uniform growth of grass every day. This pastoral cattle eat grass for 27 for 6 weeks, 9 weeks of food for 23 head of cattle, 21 head of cattle for food a few weeks?

3, a pasture, the same day, the rate of growth, and now this piece of pasture for 16 head of cattle to eat for 20 days or 12 days for the 80 sheep to eat, if a cow grazing day is equal 4, the amount of sheep grazing day, then 10 cattle and 60 sheep to eat the number of days to eat?

Example 2 has a well, a continuous emission springs gush of water per minute equal. If you use a pump to pump 3 sets, 36 minutes to smoked; If you use 5 pumps to pump water, smoked in 20 minutes. Now to be smoked within 12 minutes of well water, how many need to pump?

Active Learning:

1, a ship leaking accident, the captain immediately arrange for two pumps pumping out the same time, had already been left out of 500 barrels of water, a pump pumping per minute 18 barrels pumping another 12 barrels per minute, the water extraction was complete after 25 minutes, and asked how many barrels of water per minute leak?

2, there is a well, continuously pouring spring water, spring water per minute, the amount of emission equal. If you use 4 pumps to pumping, 40 minutes smoked; if pump to pump 5, and 30 minutes to smoked. Smoked within 24 minutes now required of well water, how many need to pump?

3, has a well, a continuous emission springs gush of water per minute, equal to, if for 15 minutes with 4 pumps can be smoked. If the pump with 7 minutes 8 smoked, now with 11 sets of pumps can be smoked how many minutes?

4, a pool drain equipped with a displacement of an equal number of roots, a pond into the drainage pipe to keep the average amount of water per minute into the same. Now if you open three 45 minutes to drain the pool water drained, if the opening 25 minutes five drainage water can be drained into the pool. If the drain opening 8, a few minutes drained the pool of water?

5, a reservoir of water a certain, uniform water inflow reservoir. 5 pumps can be drained for 20 days, 6 sets of the same pumps can be drained for 15 days. Drain if required six days,UGG bailey button, how many units the same pump?

a pasture three examples, assuming uniform growth of grass every day, this piece of pasture for 100 sheep to eat after a measured 200 days, or 150 sheep to eat for 100 days; Q: What if 250 sheep grazing How many days can eat? So many sheep grazing on it? To prevent the desertification of grassland, this pasture up to the number of sheep grazing?

Active Learning:

1, there are three grassy pastures, each to the same amount per acre and are uniform grass growth. The first 33 acres pasture, 22 head of cattle to eat for 54 days; the second pasture, 28 acres, 17 head of cattle to eat for 84 days; the third 40-acre ranch, the number of cattle to eat for 24 days?

2, there are three pastures, the grass looks like the secret court, and grow as fast, it's an area of acres, 10 acres and 24 acres. 12 After 4 weeks the first piece of cow pasture within 4 weeks old and the new grass grow; 21 second piece of cow pasture finished 9 weeks and 9 weeks of the original new grass grow. How many cows can eat the third piece 18 weeks old and the new pasture grass grow?

3,12 cattle 28 days to finish all 10 acres pasture, pasture, 21 head of cattle 63 days to finish all 30 acres pasture grass. How many head of cattle 126 days to finish all 72 acres pasture grass? (Per acre grass pasture, the amount equal to the original, and growth are equal)

4, there is a pool, pool water must have been there, the pool is equipped with a water supply line and the same number of roots drain. Inlet and one of the five open drains at the same time 8 minutes, the water can pool all drained. If the inlet pipe and one of the eight opening 4 minutes at the same time, it can pool all the water drained. Now all the drainage pipe and into the open at the same time, 2 minutes, drain off another one of the six 1 minute, the pool is empty, find the pool is equipped with a few drainage pipes.