Question

The wheel of a motor cycle is of radius 35 cm. How many revolutions per minute must the wheel make so as to keep a speed of 66 km/h?.

Answer 1

500 rpm

Step-by-step explanation:

Wheel circumference = 2 pi r = 219.91 cm

motorcycle travels 219.91 cm / rev

66 km / hr = 66 000 m/ hr = 66 000 00 cm/ hr = 110 000 cm / min

110 000 cm / min / 219.91 cm/ rev = ~ 500 rev/ min