Question

A car moves on a circular path of radius 10 metre. It complete 5 revolution in 5 minute. What is its average speed?

• A. 10 $\pi$ m / minute
• B. 20 $\pi$ m / minute
• C. 30 $\pi$ m / minute
• D. 5 $\pi$ m / minute

Answer 1

The correct option is B

20 $\pi$ m / minute

The linear speed is,

v = r $\omega$ ; $\omega$ = $\frac{\theta }{t}$

Substituting, we get,

v=20 $\pi$ m / minute