Q19 of 28 Page 4

If the arcs of the same length in two circles subtend angles 650 and 1100 at the center, find the ratio of their radii.

Let the angles subtended at the centers by the arcs and radii of first and second circles be θ1 and r1 and θ2 and r2.


Then,


We know that 180° = π rad ⇒ 1° = π/ 180 rad




We know that








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