Question

The the length of an arc is if it subtends an angle of ${60}^{\circ }$ at the centre of a circle with radius 42 cm.

• A. 44 cm
• B. 66 cm
• C. 52 cm

Answer 1

The correct option is A 44 cm

Arc length $=\frac{\text{angle subtended}}{{360}^{\circ }}\times \text{Circumference of the circle}$

$=\frac{{60}^{\circ }}{{360}^{\circ }}\times 2\times \frac{22}{7}\times 42$
$=44cm$