Question

if the perimeter of a semicircular park is 72 M find its area and radius​

Answer 1

Answer:

Step-by-step explanation:

Perimeter = 2×22/7 x

Radius = 72/2 × 7/22

Radius = 11.5

Area=3.14 ×11.5×11.5

415.265 m square

Answer 2

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The radius of the semi circular park is 14 meter.

The area of the semi circular park is 307.72 square meter.

Step-by-step explanation:

Solution :

The perimeter of the semi circular park is P=2r+\pi rP=2r+πr

We have given, P=72

P=r(2+\pi)P=r(2+π)

72=r(2+3.14)72=r(2+3.14)

72=r(5.14)72=r(5.14)

r=\frac{72}{5.14}r=5.1472

r=14r=14

The radius of the semi circular park is 14 meter.

The area of the semi circular park is A=pi r^2}{2}A=2πr2

A=3.14\times 14^2}{2}A=23.14×142

A=3.14\times 196}{2}A=23.14×196

A=3.1498A=3.14×98

A=307.72m^2A=307.72m2

Therefore, The area of the semi circular park is 307.72 square meter.