Two pipes A and B can separately fill a tank in 12 minutes and 15 minutes respectively. Both the pipes are opened together but 4 minutes after the start the pipe A is turned off. How much time will it take to fill the tank? Options: A . &nbsp8 min. B . &nbsp10 min. C . &nbsp12 min. D . &nbspnone of these

Two pipes A and B can separately fill a tank in 12 minutes and 15 minutes res

Question

Two pipes A and B can separately fill a tank in 12 minutes and 15 minutes respectively. Both the pipes are opened together but 4 minutes after the start the pipe A is turned off. How much time will it take to fill the tank?

Options:

A . 8 min.

B . 10 min.

C . 12 min.

D . none of these

Answer: Option B

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Question 1. 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?

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Question 10. 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?

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