Question

a rectangle piece of paper with 30 cm and width 12 cm has two semicircles cut out of it. Find the area of the paper that remains. use the value 3.14 for ~r

Answer 1

246.95 cm^2 (Possibly, since I do not have a diagram)

Explanation:

The width of the paper is 12cm, without a proper diagram I can only assume that the semi circles cover the width of the paper. Therefore, the radius is 6cm, since 12cm / 2 = 6cm.

First find the area of the rectangle:

L * W = A

30cm * 12cm

360cm^2

Now find the area of the circle cutouts:

r = 6

A = 3.14 * 6^2

A = 3.14 * 36

A = 113.04 cm^2

Now find the total area left by subtracting both areas:

360 - 113.04 = 246.95 cm^2