The volume of an oblique pyramid with a square base is v units3 and the height is h units.

which expression represents the area of the base of the pyramid?

3v/h units2

(3v – h) units2

(v – 3h) units2

v/3h units2

hint: its a

This is the concept of volumes of solid materials. The volume of the cone is given by:
V=1/3*(base area)*height
making base area the subject we get:
(3V)/h=base area
But:
Volume= V 
height=h units
Thus;
Base area=(3*V)/h=(3V)/h square units