if the perimeter of a semicircle Park is 72 find its area and radius
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Answered by
15
Given:-
Perimeter of circle = 72m
Let r be the radius of circle.
2πr/2 + 2r = 72
πr + 2r = 72
r = 72/π + 2
r = 72/(22/7 + 2)
r = 14m Ans.
Area of circle = πr²/2
= 22/7*14*14/2
= 308m² Ans.
Ans.) The area and radius of circular park is 308m² and 14m
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Answered by
3
Answer:
Perimeter of a semi circular = πr +2r
πr+2r = 72
(22/7)*r + 2r = 72
22*r + 14r = 72 *7 ( multiplying both sides by 7)
36r = 72*7
r =72*7/36 = 2*7 = 14m
Area of a semi circular park = 1/2 πr^ 2
= (1/2 )(22/7) * 14*14
= 14*22 = 308
= 308 cm^2
Ans = 308 square meter
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