Question

Suppose a gas tank is in the shape of a cylinder. The tank is 20 feet long and 8 feet in diameter. Find the amount of metal used to construct the tank. (Hint: use 3.14 for pi)

A 384.5ft2
B 1028ft2
C 602.9ft2
D 1570.4ft2

Answer 1

• C. 602.9 ft²

Explanation:

Surface area of a cylinder:

• A = 2πr(h + r)

Substitute values:

• A = 2(3.14)(8/2)(20 + (8/2)) = 2*3.14*4*24 = 602.88 ft²

Matching choice is C