The radius of the wheel of a bus is 175 cms and the speed of the bus is 66 km/h, then the r.p.m. (revolutions per minutes)of the wheel is Options.
A) 100	B) 250	C) 300	D) 330	E) None of these
Radius of the wheel of bus = 175 cm. Then,   circumference of wheel = 2Ï€r = 350Ï€ = 1100 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   = 1100 cm   âˆ´ Revolutions per minute = 6600000/60Ã—1100 = 100   100nswer 100
<result>A</result>
The radius of the wheel of a bus is 175 cms and the speed of the bus is 66 km/h, then the r.p.m. (revolutions per minutes)of the wheel is