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In a circle of radius 21cm,an arc substends an angle of 60degree at the centre .find a)the length of the arc |
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Answer» Step-by-step explanation: Length of ARC APB =Thita/360° × (2πr) = 60°/360° × 2 × 22/7 × 21 = 1/6 × 2 × 22/7 × 21 = 22CM |
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