The area of a semicircle is 308 sq.cm. Calculate its perimeter (in cm)
A) 144 B) 49 C) 98 D) 72
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Area of a semicircle=(πr^2)/2
308. =22r^2/7*2
308= 22r^2/14
308*14=22r^2
4312=22r^2
4312/22=r^2
196=r^2
r=14cm
perimeter of a semicircle=πr+2r
=22/7*14+2*14
= 44+28
=72cm
Hope it will help you PLzz mark the brainliest
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