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If in two circles, arcs of the same length subtend angles 60° and 75° at the centre, then find the ratio of their radii.

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If in two circles, arcs of the same length subtend angles 60° and 75° at the centre, then find the ratio of their radii.

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S1, = 5, S2 = 5, θ1 = 60° = πc/3 r1 : r2 = ?

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