Calculate the length of an arc of a circle diameter 14 cm, which substends an angle of 90o at the center of the circle
-
A.
7π/2 cm -
B.
7π cm -
C.
14π cm -
D.
7π/4 cm
Correct Answer: Option A
Explanation
Length of an arc = θ/360 x 2πr
90/360 x 2 x π x 7
= 7π/2