Question

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

Answer 1

Answer:

Step-by-step explanation:

The perimeter of a semicircular park= P = 2r + (pi)r, so

72 = [2+(22/7)]r = {36/7]r, or

r = 72*7/36 = 14 m

The area of the semicircular park = A = (pi/2)*r^2

= (22/14)*14^2

= 308 sq m

The radius of the semicircular park is 14 m and its area is 308 sq m.

Answer 2

Answer:

HEY HERE IS YOUR ANSWER ☺

Step-by-step explanation:

Perimeter of semi - circular park = 72m

perimeter =( 2 pie r)/ 2

72 =( 2×22/7 × r)/2

2× 72 = 44r/ 7

14× 72 = 44r

1008 = 44r

r = 1008/ 44

r= 22.9090 m

Now , area of semi - circular park = pie r^2

A = 22/7 ×22.9×22.9

A = 1648 .14 m^2

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