Question

A painter uses 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? What is the area that he will paint in 3 rolls?? Use 3 for pie

Answer 1

The area of wall that will be painted in one roll would be equal to the curved surface area of the roller. Therefore, the curved surface area of roller= 2*pie*radius*height Given: pie=3 So, Curved Surface Area of the roller=2*3*5*13 sq. in. = 390 sq.in Therefore, Area of the wall painted in one roll is equal to 390 sq.in. While Area of the wall painted in 3 rolls will be (390*3) or 1170 sq.in