What is the radius of the circle whose area is numerically 5 times greater than its circumference?

A) 5

B) 10

C) 4 pi

D) 2 pi

E) pi

The answer is 10, why?

Question

Eliezer Robertson

24 January, 09:10

+1

Answers (1)

Know the Answer?

Jovan Madden · Answer 1

Pi*r^2 = 5 (2*pi*r)

pi*r^2 = 10*Pi*r

divide the equation by pi

r^2=10*r

divide the equation by R

r = 10

What is the radius of the circle whose area is numerically 5 times greater than its circumference?A) 5B) 10C) 4 piD) 2 piE) piThe answer is 10, why?