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A cistern can be filled in 10 hours but it takes 12 hours due to a leak in its bottom. If the cistern is full, then the time that the leak will take to empty it is:

1. A 60 h
2. B 60 min
3. C 80 h
4. D 90 h

Three-fourth petrol of a reservoir is used to fill the petrol tanks of five trucks having the same storege capacity; What part of the total capacity of the petrol reservoir did each truck receive?

1. A 1/5
2. B 2/15
3. C 3/20
4. D 4/15

A 45000 litter water tank is to be filled at the rate of 220 litters per minute. Estimate, to the nearest half an hour, how long it will take to fill the tank?

1. A 3 hours
2. B 4 hours
3. C 5/2 hours
4. D 7/2 hours

Which of the following fraction is the equivalent of 0.5%?

1. A 1/20
2. B 1/200
3. C 1/2000
4. D 1/5

Water flows into an empty 64-gallon drum through pipe A and follows out through pipe B. If the rate of flow through A is 2 gallons/h, how many gallons per hour must flow out through pipe B so that the drum is full in exactly 96 hours?

1. A 2/3
2. B 3/8
3. C 4/3
4. D 5/2

An empty swimming pool with a capacity of 5760 gallons is filled at a rate of 12 gallons per minute. How many does it take to fill the pool to capacity?

1. A 20
2. B 480
3. C 8
4. D 96

A tank is 30% full with water. If 18 liters of water is added the tank become 3/4 full. What is the capacity of the tank?

1. A 36
2. B 40
3. C 45
4. D 56

Two pipes A & B would be fill a tank in 20 & 30 minutes respectively. Both pipes being oppen, find when A must be turned off so that the tank may be just filled in 15 minutes.

1. A After 10 minutes
2. B After 15 minutes
3. C After 20 minutes
4. D None

If a pipe fills a tank in h hours what part of the tank does it fill in 2 hours?

1. A (1 - 2)/hg
2. B 2/h
3. C 2h
4. D h/2

An empty pool is being filled with water at a constant rate. It takes 6 hours to fill 2/3rd of the pool. How much time will it take to completely fill the pool?

1. A 10
2. B 12
3. C 15
4. D 9

Two identical tapes fill 2/5 of a tank in 20 minutes. When one of the taps goes dry in how many minutes will the remaining one tap fill the rest of the tank?

1. A 10 minutes
2. B 20 minutes
3. C 5 minutes
4. D 60 minutes