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Find the circumference of the circles whose radii are given below. (i) 49 cm (ii) 91 mm |
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Answer» (i) Radius r = 49 cm Circumference C = 2 πr units = 2 x \(\frac{22}{7}\) x 49 = 2 x 22 x 7 = 44 x 7 = 308 cm (ii) Radius r = 91 mm Circumference C = 2 πr units = 2 x \(\frac{22}{7}\) x 91 = 2 x 22 x 13 = 44 x 13 = 572 mm |
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