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
Verified Correct Answer: A.
Step-by-Step Mathematical Solution
Diameter = 42cm
Length of the arc = \(\frac{\theta}{360^\circ} \times \pi d\)
= \(\frac{60}{360} \times \frac{22}{7} \times 42cm\)
= \(22cm\)
Source: Myschool Past Questions Archive (Record #30823)