The distance traveled by a cyclist moving on a circle of radius 15 m. If he makes 3.5 revolution is ___?

90m

10π m

105π m

None of these

The circumference of the circle is:

2 × π × r = 2 × π × 15 = 30π m

Distance traveled in 3.5 revolutions:

= 3.5 × 30π

= 105π m