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 cu.m , then the rise in the water level in the tank will be:
A) 20 cm
B) 25 cm
C) 35 cm
D) 50 cm
Answer: B) 25 cm
Explanation:
Total volume of water displaced =(4 x 50) cu.m = 200 cu.m