# In a Circle of Diameter 42cm ,If an arc Subtends an Angle of 60 ˚ at the Centre Where ∏=22/7,then the Length of the Arc is - Bzziii

In a circle of diameter 42cm ,if an arc subtends an angle of 60 ˚ at the centre where \pi=22/7,then the length of the arc is (a) 22/7 cm (b) 22

In a circle of diameter 42cm ,if an arc subtends an angle of 60 ˚ at the centre where \pi=22/7,then the length of the arc is

(a) 22/7 cm
(b) 22 cm
(c) 44 cm
(d) 11cm

(b) 22 cm

Explanation:

Length of Arc APB = \frac{\theta}{360}\times(2\pi "r")

= \frac{60}{360}\times 2 \times 22/7\times 21

= 1/6 \times 2\times 22/7 \times` 21

= 22 cm