If area of sector of a circle is 105cm² and length of the arc is 30cm² calculate the radius of the circle
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Answer:
A = 105cm²
l = 30cm
radius = r
since , A = ½lr
so, 105 = ½ × 30 * r
= > 105 = 15r
= > r = 105 /15 = 7
so , radius = 7cm
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Answer:7 cm
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