Question

Find the circumference of a circle whose area is 452.16 square meters. (Use 3.1416 as the value of π.) A. 24 meters B. 37.6992 meters C. 12 meters D. 75.3984 meters

Answer 1

D is the correct answer. To work out the radius of a circle from the area, find the square root of the area/pi. This makes square root of 452.16/3.1416 = 12. The circumference is 2 x pi x r = 2 x 3.1416 x 12. The circumference is 75.3984.