In a circle of radius 21 cm an arc subtends an angle of 72° at the centre. The

Question

In a circle of radius 21 cm an arc subtends an angle of 72° at the centre. The length of the arc is?

Options:

A . 13.2 cm

B . 21.6 cm

C . 19.8 cm

D . 26.4 cm

Answer: Option D

Arc length = 2?r (?° / 360°) = 2 x (22/7) x 21 x (72° / 360°) cm= 26.4 cm

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