A storage tank is in the form of a cube. When it is full of water, the volume of water is 15.625m^3. If the present depth of water is 1.3 m, find the volume of water already used from the tank.

Volume of tank=volume of water=15.625m^3 l^3=15.625 l=2.5m Volume of water upto depth 1.3m=2.5*2.5*1.3=8.125m^3 Volume of water left=15.625-8.125=7.5m^3 So volume of water used is equal to 7.5m^3

Approved