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Find the degree measure of the angle subtended at the centre of a circle of

radius 100 cm by an arc of length 22 cm.(Use π = 22/7)

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We know that in a circle of radius r unit, if an arc of length l unit subtends

an angle θ radian at the centre, then θ = l/r

Therefore, for = 100 cm, l = 22 cm, we have

Thus, the required angle is 12°36′.

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