Surface Area formula of a cylinder:
S.A = 2 × Area of base + Perimeter of base × Height of prism
= 2\(\pi\)r² + 2\(\pi\)rh
= 2\(\pi\)(10)² + 2\(\pi\)(10)(100)
{We took 10 ft as the radius because the diameter is 20 ft, so the radius is half the diameter}
= 200\(\pi\) + 2000\(\pi\)
= 2200\(\pi\) ft² (in terms of \(\pi\))
= 6911.5 ft² (to the nearest tenth)