A figure is made of a rectangle 8 by 5 with a semicircle of radius 4 attached to one short side. Using 3.14 for pi, what is the total area, rounded to the nearest whole number?

Correct answer to question 186 (Mathematics Knowledge): 65

Method

The rectangle contributes 8 x 5 = 40. The semicircle contributes half of pi times radius squared: 3.14 x 16 / 2 = 25.12. Adding gives about 65.