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[" Q.3.If area of sector of a circle is ...

[" Q.3.If area of sector of a circle is "105cm^(2)" and length of its arc is "30cm" ,calculate the radius of the circle."],[[" (a) "5cm," (b) "6cm," (c) "7cm," (d) "8cm" [Ans.(c); "7cm]]

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