Find the length of the arc of a circle of diameter 10 cm subtended by the central angle of 60°.
Show answer & explanation
Correct answer: B
Explanation
Diameter = 10 cm ⇒ Radius = 5 cm
Angle = 60°
Arc length = (θ/360) × 2πr
= (60/360) × 2π × 5
= (1/6) × 10π
= 5π/3
= 5 × 3.14 / 3 = 5.24