A cube of edge 15 cm is immersed completely in a rectangular vessel containing water. If the dimensions of the base of vessel are 20 cm x 15 cm, find the rise in water level.

A. 10 cm

B. 10.25 cm

C. 11 cm

D. 11.25 cm

Correct Answer :

D. 11.25 cm

Increase in volume = Volume of the cube = (15 x 15 x 15) cm^{3}.

Rise in water level = volume/area = (15 x 15 x 15)/(20 x 15) cm = 11.25 cm.