Which expression represents the volume of the pyramid?

One-thirdxy cm3
One-thirdx2y cm3
One-halfxy2 cm3
One-halfx2y cm3

Option B

One-third y cm 3

Explanation:

We will be assuming we are dealing with a square based pyramid, which has the shape of its base as a square. The volume of a pyramid is got by multiplying its base area, height and a factor - 1/3.

For our square based pyramid, we will assume it has dimensions; length breadth and height to be (x , x, and y) respectively.

(the length and breadth are the same because it has a square base)

hence the volume will be  

This will be

Hence our correct answer is option B:  One-third y cm3