Question

What is the arc length when θ = 3 pi over 5 and the radius is 7 cm? (5 points)

3 pi over 35 cm
12 pi over 5 cm
6 pi over 5 cm
21 pi over 5 cm

Answer 1

D

Explanation:

I took the test

Answer 2

The correct answer is 21π/5

Explanation:
The arc length of a circle is given as = radius × angle subtended by the arc at centre.
Here, r = 7 cm.
θ = 3π/5
Therefore, arc length, l = rθ = 7×3π/5 = 21π/5