Solve the Problem $\frac { 2 \pi } { 175 }$

Multiple Choice

Solve the problem.
-A pulley of radius 25 cm rotates 7 times in 4 sec. Find the angular speed of the pulley.

A) $\frac { 2 \pi } { 175 }$ radian per sec
B) $\frac { 175 \pi } { 4 }$ radians per sec
C) $\frac { 7 \pi } { 2 }$ radians per sec
D) $\frac { 4 \pi } { 175 }$ radian per sec