if a water tank is 3feet*3feet*3feet how much water it will contain and if it is circular case and diameter is of 5feet n height 5feet

2 answers

This just does not make sense.

a 3x3x3 ft^3=27ft^3

it cannot be circular case if it is a cube
maybe they're separate problems. In that case, just use the normal formula

v = π/4 d^2 h

and use your numbers