A cistern can be filled by two pipes A and B 7 1/2. They are opened for 2 1/2 hours and then B is closed. A alone now requires 6 2/3 hr more to fill cistern. How long would A take to fill the cistern working alone ?

Question

Raj Soni · Accepted Answer

Is it 9.99 hours? Not sure abt the answer tho

Arsenal Wenger · Answer

Gautam Vishnu M. · Answer

Use fractions. You'll get exactly 10.

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A cistern can be filled by two pipes A and B 7 1/2. They are opened for 2 1/2 hours and then B is closed. A alone now requires 6 2/3 hr more to fill cistern. How long would A take to fill the cistern working alone ?