Volume of prismatic solid = area of base × height
Volume of a pyramid = 1/3 × area of base × height
here, A pyramid is given whose base is a square of side 7 inch and height is 8.5 inch.
Volume = 1/3 × 7^2 × 8.5 in^3
= 138.83 in^3
To the nearest whole number, volume = 139 in^3