The radius of the wheel of a bus is 100 cms and the speed of the bus is 66 km/h, then the r.p.m. (revolutions per minutes)of the wheel is  Choose one:  A) 175  B) 250  C) 300  D) 330  E) None of these
Radius of the wheel of bus = 100 cm. Then,   circumference of wheel = 2Ï€r = 200Ï€ = 628.57 cm   Distance covered by bus in 1 minute   = 66â„60 Ã— 1000 Ã— 100 cms   Distance covered by one revolution of wheel   = circumference of wheel   = 440 cm   âˆ´ Revolutions per minute = 6600000/60Ã—628.57 = 175   175nswer 175
<result>A</result>
The radius of the wheel of a bus is 100 cms and the speed of the bus is 66 km/h, then the r.p.m. (revolutions per minutes)of the wheel is