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A wheel of a motor bike has radius 35 cm . How many revolutions per minute must the wheel make so that the speed of the bike is 33 km/hr ?

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A wheel of a motor bike has radius 35 cm . How many revolutions per minute must the wheel make so that the speed of the bike is 33 km/hr ?
A. 300
B. 250
C. 200
D. 220
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Correct Answer - B
Circumference = `(44)/(7) xx 35 = 220` cm
Distance travelled in 1 minute = `(33000)/(60) = 550` m
Required no. of revolutions = `(550 xx 100)/(220) = 250`
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