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What is the thikness of a pipe that has an outer diameter of 2.5 inches and inner diameter of 2.1 inches?

1. A 0.2 inches
2. B 0.3 inches
3. C 0.4 inches
4. D 2.3 inches

An empty swimming pool can be filled to capacity through an inlet pipe in 3 hours and it can be completely drained by a drainpipe in 6 hours. If both pipes are fully open at the same time, in how many hours will the empty pool be filled to capacity?

1. A 4
2. B 5
3. C 5.5
4. D 6

One pipe can fill a pool in 6 hours and a second pipe can fill the same pool in 12 hours. If both pipes work together, how long will it take to fill the pool?

1. A 3 hours
2. B 3.5 hours
3. C 4 hours
4. D 4.5 hours

A pump can fill a tank with water in 2 hours. Because of a leak, it took 7/3 hours to fill the tank. The leak can drain all water of the tank in:

1. A 13/3 hrs
2. B 14 hrs
3. C 7 hrs
4. D 8 hrs

A pipe can fill a tank in 64 minutes and another can empty it in 32 minutes. If the tank is already half full and both pipe opened together, the tank will be--

1. A emptied in 32 minutes
2. B emptied in 64 minutes
3. C filled in 32 minitues
4. D filled in 64 minutes

The water in a fish tank measuring 5/4 feet by 8 inches is 7 inches high. The water is poured into another tank measurinig 14 inches by 20 inches. What will be the height of water, in inches in the secont tank?

1. A 1/12
2. B 1/4
3. C 2
4. D 3

A patrol tank that is 1/2 full has 8 gallons petrol removed. The tank is then 1/10 full. What is the capacity, in gallons of the tank?

1. A 20
2. B 30
3. C 31/2
4. D 40

Two pipe A & B can fill a tank in 15 minutes and 20 minutes respectively. If both pipes are opend together, then after how much time B should be closed so that the tank is full in 10 minutes?

1. A 20/3
2. B 4
3. C 6
4. D 8

A machine fills a bag with 7 ounces of potato chips in 3.5 seconds. At this rate, how many seconds will take the machine to fill a bag with 15 ounces of potato chips?

1. A 6.5
2. B 7.0
3. C 7.5
4. D 8.0

A water tank is 5/8th full. When 100 gallons of water is used the tank is half full. What is the capacity of the water tank?

1. A 1600
2. B 2000
3. C 500
4. D 800

One-third of a cylindrical oil tank is filled.If 3 more litters are added a half of the tank will be filled. What is the capacity in litters of the tank?

1. A 14
2. B 15
3. C 17
4. D 18

It takes 7/4 minutes to fill a water jar. What part of the jar would be filled in 1 minute?

1. A 2/7
2. B 3/4
3. C 3/7
4. D 4/7