A motor cycle is moving with the speed of 47.52 km/hr and the radius of the wheel of the motorcycle is 21 cms. Calculate the approximate no of revolutions made by the wheel in one minute. Choose the correct choice:
A) 400 rpm  B) 500 rpm  C) 600 rpm  D) 700 rpm  E) 800 rpm
Given Speed = 47.52 km/h = 47.52 * 1000/60 m/s   = 792 metre/minute   the radius of the wheel of the motorcycle = 21 cm   circumference of the wheels = 2*22/7*21= 
<gadget id="calculator">2*22/7*21</gadget>
<output>132</output>
132cm= 1.32 m   Number of revolutions made by the wheel in one minute   = Speed (in metre/minute)/circumference(in m)   = 792/1.32= 
<gadget id="calculator">792/1.32</gadget>
<output>600</output>
600   So no of revolutions made by the wheel in one minute will be 600   ANSWER:600 rpm
<result>C</result>
A motor cycle is moving with the speed of 47.52 km/hr and the radius of the wheel of the motorcycle is 21 cms. Calculate the approximate no of revolutions made by the wheel in one minute.