Question

If the perimeter of a semi circular park is 72 m find its area and radius

Answer 1

perimeter = 2*pi*r
72 = 2*pi*r

so, r =72/( 2*pi)
hence radius= 11.45 m
area= pi*r^2 = pi * 11.45^2

area = 412.47 m^2

Answer 2

Answer:

Step-by-step explanation:

πr+2r=72

r(π+2)=72

r(22/7+2)=72

r(36/7)=72

r=72×7/36

r=14