Answer:


Step-by-step explanation:
Given


See attachment
From the attachment A and B are vertically opposite.
This implies that:

Substitute values for A and B

Collect Like Terms


Solve for x


Substitute 20 for x in 


8 because 24 divided by 3 is eight
D=2r so the diameter is 10.4ft. Multiple 10.4ft by 3.14 to get the answer. The answer is 32.656