Question

You have a coin bank in the shape of a cylinder. It has a radius of 1.5 inches and a height of 5 inches. What is the surface area of the coin bank? Use 3.14 to approximate pi. Round your answer to the nearest hundredth.

Answer 1

Explanation:

The top and the bottom are easiest to find.

Area_top = pi*r^2

r = 1.5

Area_top = 3.14 * 1.5^2

Area_top = 3.14 * 2.25

Area_top = 7.065

But there are 2 of them (top and bottom) which is 14.13

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Area of the body of the cylinder

Area body = circumference of the circle * height

C = 2*pi*r

r = 1.5

C = 2 * 3.14 * 1.5

C = 9.42

Area body = 9.42 * 5

Area body = 47.1

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The sum of both of these is the answer you want

47.1 + 14.13 = 61.23 square inches.