1.

Two pipes A and B can fill a cistern in 37\frac{1}{2}37​2​​1​​minutes and 45 minutes respectively. Both pipes are opened. The cistern will be filled in 30 minutes, if Pipe B is turned off after:

Answer»

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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