Pipes and Cisterns - Data Intensity 1 | Multiple Questions and Answers

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Pipes and Cisterns - Data Intensity 1 Multiple Questions and Answers.

51.	Two pipes A and B can separately fill a tank in 2 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?

	A.	9 min
	B.	10 min
	C.	11 min
	D.	12 min

52.	Two pipes A and B can fill a cistern in 20 and 30 minutes respectively, and a third pipe C can empty it in 40 minutes. How long will it take to fill the cistern if all the three are opened at the same time?

	A.	19 1/7 min
	B.	15 1/7 min
	C.	17 1/7 min
	D.	7 1/7 min

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