In covering a distance s m, a circular wheel of radius r m makes 
revolution. Is this statement true? Why?
True
The distance travelled by a circular wheel of radius r m in one revolution is equal to the circumference of the circle = 2πr
∴ No. of revolutions completed in 2πr m distance = 1
No. of revolutions completed in 1 m distance = (1/2πr)
No. of revolutions completed in s m distance = (1/2πr) × s
6