Question

A painter has a roller to paint a wall. The roller has a radius of 5 inches and a height of 13 inches. In one roll, what is the area of the wall that he will paint

Answer 1

Answer:

The area would be 130π sq. inch

Answer 2

Concept

Cylinder is a three dimensional shape in mathematics which is a solid that holds two parallel bases joined by a curved surface at some fixed distance.

Given

1) Roller has radius 5 inches

2) Roller has height of 13 inches

Find

In one roll what will be the area of the wall that he will paint

Solution

We need to find the area of the wall that he will paint

So, we need to find the area of cylinder

Area of cylinder = 2(π)rh

Area = 2 * π * 5 *13

Area = 10 * π *13

Area = 130  * π

In one roll what he will paint 130π inches².

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