A chord of a circle of a diameter 42cm subtends an angle ...
A chord of a circle of a diameter 42cm subtends an angle of 60° at the centre of the circle. Find the length of the mirror arc
22cm
44cm
110cm
220cm
Correct answer is A
Diameter = 42cm
Length of the arc = \frac{\theta}{360°} \times \pi d
= \frac{60}{360} \times \frac{22}{7} \times 42cm
= 22cm
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