Q1:
50 men took a dip in a water tank 40 m long and 20 m broad on a religious day. If the average displacement of water by a man is 4 m3, then the rise in the water level in the tank will be:
A 50 cm
B
35 cm
C
20 cm
D 25 cm
ANS:B - 25 cm
Total volume of water displaced = (4 x 50) m3 = 200 m3.
Rise in water level =
m 0.25 m = 25 cm.