A pipe can fill a cistern in 12 minutes and another pipe can till it in 15 minut

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Question

A pipe can fill a cistern in 12 minutes and another pipe can till it in 15 minutes. But a third pipe can empty it in 6 minutes. The first two pipes are kept open for 5 minutes in the beginning and then the third pipe is also opened. In what time is the cistern emptied?

Options:

A . 35 min.

B . 40 min.

C . 45 min.

D . 50 min.

Answer: Option C

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More Questions on This Topic :

Question 1. A tap can fill a cistern in 6 hours, but due to a leakage at the bottom of the cistern, it takes 1 hours more to fill....off, in what time will the leakage empty the cistern?

Question 2. If two pipes function simultaneously, a reservoir will be filled in 12 hours. One pipe fills the reservoir 10 hours f....hours does the faster pipe take to fill the reservoir?

Question 3. There is a leak in the bottom of a cistern. Before the leak, it could be filled in \(3\frac{1}{2}\) hours, it now tak....full, the time taken to empty the cistern would be

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Question 5. An outlet pipe can empty \(\frac{2}{3}^{rd}\) of a cistern in 12 minutes. In 8 minutes, what part of the cistern....8 minutes, what part of the cistern will be emptied?

Question 6. Two pipes can separately fill a tank in 20 hours and 30 hours respectively. Both the pipes are opened to fill the tan....What is the total time taken to fill the tank?

Question 7. Two pipes X and Y can separately fill a cistern in 18 hours and 24 hours respectively. If they are turned on alternat....each, how long will it take to fill the cistern?

Question 8. Two filler pipes X and Y can separately fill a tank in 45 and 40 minutes respectively. They start to fill the tank to....minutes. After how many minutes is pipe X turned off?

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Question 10. Six pipes are fitted to a tank. Some of these are filler pipes and some are outlet pipes. Each filler pipe can fill t....filled in 3 hours. Find the number of filler pipes.

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