Final answer:
The volume of the trapezoid is 2880ft^3
Step-by-step explanation:
To find the volume of a trapezoid, we need to first find the area of the base and then multiply it by the height of the trapezoid.
The formula for the area of a trapezoid is: (a + b) / 2 * h, where a and b are the lengths of the two parallel sides and h is the height.
In this case, the lengths of the two parallel sides are 40ft and 80ft, and the height is 24ft.
Plugging these values into the formula, we get: (40 + 80) / 2 * 24 = 120 * 24 = 2880ft^3