Answer:
Option B
80 in²
Explanation:
Volume, V of any shape is the product of cross-sectional area and height. Therefore, V=Ah
Where A is the cross sectional area and h is the height.
Making A the subject of the formula then
A=V/h or V÷h
Substituting 400 in³ for V and 5 in for h then
A=400 in³÷5 in=80 in²
Therefore, the area of base is 80 in²