Question

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

Answer 1

Here , perimeter = 72

perimeter of semi circle is πr + 2r

72 = r ( π + 2 )

72 = r ( 3.14 + 2 )

72 = r * ( 5.14 )

r = 14.00m

area of semicircle = 1/2πr^2

= 22/7 * 14 * 14 * 0.5

= 22 * 2 * 14 * 0.5

= 308m^2.

Hope it helps!

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