if the are of a semicircle is 66cm, the diameter is- (π=22/7)
(a)21cm (b)24cm (c)42cm (d)12cm
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Answer:
Area of semicircle=66 cm
Formula of semicircle=πr^2/2
π = 22/7
πr^2/2=66
πr^2=66×2
πr^2=132
r^2=132/π
r^2=132×7/22
r^2=42
r=√42
D=2R
D=2×√42
D=2√42
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Answer:
NOTA.
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