Question

A company is going to make an oil container in the shape of a cylinder. As shown below, the container will have a height of 7m and a diameter of 8m. The container will be made from steel (including its top and bottom). If the steel costs 29$ for each square meter, how much will the steel cost in total? Use 3.14 for pi, and do not round your answer.

Answer 1

Explanation:

Two ends' area = 2 * pi r^2 r is radius = 1/2 diameter = 4m

2 * 3.14 * (4^2) = 100.48 m^2

Sidewall is cicumfernce ( = pi *d) times the height ( =7m)

3.14 * 8 *7=175.84 m^2

Cost = (100.48 +175.84) m^2 * $ 29 /m^2 = $ 8013.28