Two pipes A and B together can fill a cistern in 4 hours. Had they been opened s

Question

Two pipes A and B together can fill a cistern in 4 hours. Had they been opened separately, then B would have taken 6 hours more than A to fill the cistern. How much time will be taken by A to fill the cistern separately?

Options:

A . 1 hour

B . 2 hours

C . 6 hours

D . 8 hours

Answer: Option C

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