Please explain the solution, opts are 48 ltrs, 36 ltrs , 24 ltrs , 16 ltrs.

There are 10 filling pipes each capable of filling a cistern alone in 6 minutes and 6 emptying pipes each capable of emptying a cistern alone in 8 minutes. All pipes are opened together and as a result, tank fills 22 litres of water per minute. Find the capacity of the tank.

Your Answer

Work done in one minute by 10 pipes filling and 6 pipes emptying the cistern is
    10(1/6)-6(1/8) = 11/12
Time = 1/work ==> Time = 12/11 * 22 = 24 ltrs.

the answer is 24 ltrs.

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