Problem 9
The area of a trapezoid is computed using the following formula.

In order to use the formula, for this problem
a = 17
b = 14
h = diameter of the half circle = 2*7 = 14
Therefore using the formula for the area of a trapezoid
We have that the area of the trapezoid on the figure would be

Now, the area of the half circle would be

So the area of the base would be

And since the solid is a right solid, we just multiply by the height
So, the volume of the right solid would be
