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 4m3 , then the rise in the water level in the tank will be: Choose the correct choice from the following options
A) 20 cm  B) 25 cm  C) 35 cm  D) 50 cm  E) None of these
Explanation:   Total volume of water displaced =(4 x 50) m3 = 200 m3   Rise in water level = 200/40×20= 0.25m = 25cm   Answer: 25 cm
<result>B</result>
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 4m3 , then the rise in the water level in the tank will be: