50 men took a dip in water tank 40 m long and 20 m broad on a religious day. If the average displacements of water by a man is 4 m3, then the rise in the water level in the tank will be Choose the correct answer
A) 20 cm  B) 25 cm  C) 35 cm  D) 50 cm  E) None
Solution   Total number of water displaced	= (4 ×50)m3   ‹=› 200m3   Rise in water level	= (200 / 40×20)m   = 0.25 m   ‹=› 25 cm   Answer 25 cm
<result>B</result>
50 men took a dip in water tank 40 m long and 20 m broad on a religious day. If the average displacements of water by a man is 4 m3, then the rise in the water level in the tank will be