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 Multiple Choice QuestionsMultiple Choice Questions

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1.

Pipe A fills a water tank in 24 minutes. Pipe B fills the same tank 7 times as fast as pipe A. If both the pipes are kept open, in how many minutes will the empty tank be filled?

  • 2

  • 2.5

  • 3

  • 3.5

122 Views

2.

Two pipes A and B can fill a tank with water in 30 min and 45 min, respectively. The water pipe C can empty the tank in 36 min. First A and B are opened. After 12 min, C is opened. Total time (in min) in which the tank will be filled up, is

  • 30

  • 24

  • 36

  • 36

259 Views

3.

An empty pool being filled with water at a constant rate takes 8h to fill 3/5 th of its capacity. How much more time will it take to finish filling the pool?

  • 5 h 30 min

  • 5 h 20 min

  • 4 h 48 min

  • 4 h 50 min

228 Views

4.

A electric pump can fill a tank in 2 hours. Because of a leak in the tank, it was taking 2 1 half space hours to fill the tank. The leak can drain all the water off the tank in how many hours?

  • 9 hours

  • 10 hours

  • 10 1 half space hours
  • 10 1 half space hours
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5.

A tank has two pipes. The first and pipe can fill it in 4 hours and the second can empty it in 16 hours. If two pipes be opened together at a time, then the tank will be filled in

  • 5 1 half hours
  • 10 hours

  • 6 hours

  • 6 hours

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6.

Having the same capacity 9 taps fill up a water tank in 20 minutes. How many taps of the same capacity are required to fill up the same water tank in 15 minutes?

  • 10

  • 12

  • 15

  • 15

498 Views

7.

A cistern has 3 pipes A, B and C. A and B can fill it in 3 and 4 hours respectively, and C can empty it in 1 hour. If the pipes are opened at 3 p.m., 4 p.m. and 5 p.m. respectively on the same day, the cistern will be empty at

  • 7 : 12 p.m.

  • 7 : 15 p.m.

  • 7 : 10 p.m.

  • 7 : 10 p.m.

716 Views

8.

A tank can be filled by pipe A in 2 hours and pipe B in 6 hours. At 10 A.M. pipe A was opened. At what time will the tank be filled if pipe B is opened at 11 A.M.?

  • 12.45 A.M.

  • 5 P.M.

  • 11.45 A.M.

  • 11.45 A.M.

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9.

A swimming pool has 3 drain pipes. The first two pipes A and B, operating simultaneously can empty the pool in half the time that C, the 3rd pipe alone takes to empty it. Pipe A, working alone, takes to empty it. Pipe A, working alone, takes half the time taken by pipe B. Together they take 6 hours 40 minutes to empty the pool. Time taken by pipe A to empty the pool, in hours, is

  • 15

  • 10

  • 30

  • 30

727 Views

10.

Two pipes can fill an empty tank separately in 24 minutes and 40 minutes respectively and a third pipe can empty 30 gallons of water per minute. If all the three pipes are open, empty bank becomes full in one hour. The capacity of the tank (in gallons) is

  • 800

  • 600

  • 500

  • 500

745 Views

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