To fill a cistern pipes A, B and C take 20 minutes, 15 minutes and 12 minutes respectively. The time, in minutes, that the three pipes together will take to till the cistern is Options: A . &nbsp5 B . &nbsp7 C . &nbsp9 D . &nbsp12

To fill a cistern pipes A, B and C take 20 minutes, 15 minutes and 12 minutes

Question

To fill a cistern pipes A, B and C take 20 minutes, 15 minutes and 12 minutes respectively. The time, in minutes, that the three pipes together will take to till the cistern is

Options:

A . 5

B . 7

C . 9

D . 12

Answer: Option A

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Question 1. Two pipes X and Y can fill a cistern in 20 minutes and 30 minutes respectively. A third pipe Z can empty it in 40 min....all the three pipes are opened at the same time?

Question 2. A tap can fill a tank in 16 minutes and another can empty it in 8 minutes. If the tank is already full and both the ....filled completely or emptied completely as the case may be?

Question 3. Two pipes A and B can separately till a tank in 12 minutes and 15 minutes respectively and a third pipe C can drain o....in 15 minutes. What is the capacity of the tank?

Question 4. An empty cistern has three pipes A, B and C. A and B can fill it in 5 hours and 6 hours respectively and C can empty ....and 3 a.m., when will the cistern be empty again?

Question 5. Two pipes A and B can separately fill a tank in 12 minutes and 15 minutes respectively. Both the pipes are opened tog....How much time will it take to fill the tank?

Question 6. Two pipes A and B can separately fill a cistern in 10 minutes and 15 minutes respectively. A person opens both the pipes....time can the waste pipe empty the cistern when full?

Question 7. A leak in the bottom of a tank can empty the full tank in 6 hours. An inlet pipe fills water at the rate of 4 litres ....emptied in 8 hours. The capacity of the tank is

Question 8. 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 m....is also opened. In what time is the cistern emptied?

Question 9. 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 10. 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?

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