A rectangular flower vase whose base is 20 cm long and 15 cm wide is half-filled with water. When Michelle placed some stones in the vase, the water rises from 5 cm to 7 cm. What is the volume of the stones that Michelle put in the vase?

Question

P.S. Write your solution

Answer 1

The water level rose 2 cm. So, the volume of the stones is 2*20*15=600 cm^3

This assumes that the stones were completely covered by water.