math
posted by WAN .
an open steel tank measures 2m by 2.5m by 3m.It holds 7500 ml of water.What is the volume of steel,in cubic metres,making up the sides of the tank ?

2*2.5*3 = 15 m^3
7500 mL = 7.5 m^3
so steel volume = 15 7.5 = 7.5 m^3
( ridiculously strong tank )