The diameter of the driving wheel of a bus in 140 cm. How many revolutions per minute must the wheel make in order to keep a speed of 11 kmph?	Choose one.
A) 21.23  B) 52.85  C) 23.26  D) 41.67  E) 25.15
distance covered in 1 min=(66*1000)/60=183.33cm   circumference of the wheel=(2*(22/7)*.70)= 
<gadget id="calculator">(2*(22/7)*.70)</gadget>
<output>4.4</output>
4.4m   no of revolution per min=183.33/4.4=41.67   ANSWER:41.67
<result>D</result>
The diameter of the driving wheel of a bus in 140 cm. How many revolutions per minute must the wheel make in order to keep a speed of 11 kmph?