Question

In a swimming pool measuring 90 m by 40 m, 150 men take a dip. If the average displacement of water by a man is 8 cubic metres, what will be the rise in water level?

Answer 1

total volume displacement by 8 men = 150×8 m cube

however volume=l×b×h= 90×40×h

then 90×40×h=150×8

hence h = 1/3m