Two pipes A and B would fill a cistern in 20m and 30min respectively both pipes are kept open for 10...........

Quant (SSC) Pipes&cistern

Two pipes A and B would fill a cistern in 20m and 30min respectively, both pipes are kept open for 10min and the first pipe be turned off after that the cistern may be filled in

6min

5min

8min

10min

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Explanation:

10(1/20+1/30) = 10[3+2/60]
= 50/60 = 5/6
Remaining part = 1-5/6
= 6-5/6 = 1/6
Second pipe = 30*1/6 = 5min
Hence, option 2 is the correct answer.

By: Amit Kumar

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Two pipes A and B would fill a cistern in 20m and 30min respectively both pipes are kept open for 10...........

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Explanation:

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