Find the length of the arc of a circle with radius 5 cm, if its central angle is 70°.
Answer & explanation
Correct answer: option 2
Given circle with radius = 5 cm
Circumference = 2Πr = 10Π (For 360º)
Length of arc for 70º = 10Π * 70/360 = 70Π/36
The correct answer is Option (2) → $\frac{35}{18}$π cm