SOLUTION
The lateral surface area of a cylinder is calculated using this formula:
[tex]A_L=\text{ 2}\pi rh[/tex]Where r = radius and h = height
From the question, radius = 7 feet and height = 21 feet, substituting these
parameters into the lateral surface area formula given above, we can get the answer to the question:
[tex]\begin{gathered} A_L=2\pi rh \\ =2\times3.14\times7\times21 \\ =923.16ft^2 \\ =923.2ft^2(to\text{ the nearest tenth)} \end{gathered}[/tex]The lateral surface area of the cylinder is
[tex]923.2ft^2[/tex]
