Two pipes A and B can fill a cistern in 37\frac{1}{2}3721minutes and 45 minutes respectively. Both pipes are opened. The cistern will be filled in 30 minutes, if Pipe B is turned off after:
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As per the question,
Cisterns are filled in a total of 30 minutes
Hence, if pipe A is working for 30 minutes
then, It will fill about = 30 * 6 = 180 units
Remaining capacity = 225 – 180 = 45 minutes
Hence, the capacity of the B tank = 45/5 = 9 minutes
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