A right rectangular prism is a solid object with 6 faces, 12 edges and 8 vertices.
Its called a right rectangular prism because the angles between the base and the sides are all right angles.
The volume of a right rectangular prism is given by the formula;

We have been given the base area and this is 3 square yards. Note that the base area is derived as follows;

This means, the length times the width has already been solved.
We now have the volume re-written as;

Where the value of the height is;

We now have;

ANSWER:
The volume of the right rectangular prism is 25 cubic yards.