Question

A reservoir in the form of a cube has a capacity of 27 cubic metre after using it water to a depth of 1m how much water is left in it

Answer 1

if the volume is 27 m^3,
the edge is em as 3^3 = 27.
we use 1m height. So left dimensions are
2*3*3=9*2=18m^3/18 sq. metre