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8. If the arcs of the same length in two circles subtend angles 75째 and 120째 atthe centre, find the ratio of their radii. |
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Answer» The length of an arc (L) is : x/360 . 2πr given L1 = L2 75/360 . 2πr1 = 120/360 . 2πr2 r1/r2 = 8/5 |
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