Question

find the radius of a circle whose circumference is 220 m

Answer 1

Answer:

Circumference of a circle is given by

2 x pi x r = 220 m

Therefore we solve for r and get;

r = 110/pi m

r = 110/3.142 m

 

Area of the circle may now be calculated using the formula:

 

Area = pi x r x r

= 3.142 x 110/3.142 m x 110/3.142 m

= 3849.9 m2

Answer 2

radius = 2πr = 220
r = 220/2 ×7/22 = 35 m