A chord of a circle of a diameter 42cm subtends an angle of 60o at the centre of the circle. Find the length of the mirror arc
-
A.
22cm -
B.
44cm -
C.
110cm -
D.
220cm
Correct Answer: Option A
Explanation
Diameter = 42cm
Length of the arc = (frac{theta}{360°} times pi d)
= (frac{60}{360} times frac{22}{7} times 42cm)
= (22cm)