Question

Qid : 22 - the area of a semicircle is 1925 cm2. Calculate its perimeter (in cm).

Answer 1

Answer:

area of semicircle =1/2 πr²

1925=1/2*22/7*r²

r²=(1925*7*2)/22

r²=1925*7/11

r²=175*7

r²=25*7*7

r=35cm

perimeter of semicircle=πr+2r

=22/7*35+2*35

=110+70

=180cm

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