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?
NCERT Class X
Mathematics - Exemplar Problems
Chapter _AREA RELATED TO CIRCLES
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Revolutions per hour = 66/(2*22/7*35)*100000 = 0.3*100000
Revolutions per minute = 0.3/60*10000 = 500
Revolutions per minute = 0.3/60*10000 = 500
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