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प्रश्न
Select the correct option from the given alternatives :
A semicircle is divided into two sectors whose angles are in the ratio 4:5. Find the ratio of their areas?
विकल्प
5:1
4:5
5:4
3:4
उत्तर
4:5
Explanation:
`θ_1/θ_2 = 4/5`
`"A"_1/"A"_2 = (1/2 "r"^2 θ_1)/(1/2 "r"^2 θ_2)`
`"A"_1/"A"_2 = 4/5`
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