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A boy is cycling such that the wheels of the cycle are making 140 revolutions per minute. If the diameter of the wheel is 60 cm, calculate the speed in Km per hour in which the boy is cycling?(with solution)
Most Upvoted Answer
A boy is cycling such that the wheels of the cycle are making 140 revo...
Radius of the wheel =r=60​/2=30 cm


Circumference of the wheel =2πr=2×22​/7×30=1320​/7 cm


Distance covered in 1 revolution =1320​ /7cm


Distance covered in 140 revolutions =1320​/7×140=26400 cm=264 m=264​ /1000km


Distance covered in one minute = Distance covered in 140 revolutions =264​/1000 km


Distance covered in 1 hour =264​/1000×60=15.84 km


Hence, the speed with which the boy is cycling is 15.84km/hr.
Community Answer
A boy is cycling such that the wheels of the cycle are making 140 revo...
Distance covered by the boy = 2×22/7×30/100×140 => 264 m.S=D/T S=264/60 = 4.4 m/s 4.4× 18/5 15.84 km/h.
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A boy is cycling such that the wheels of the cycle are making 140 revolutions per minute. If the diameter of the wheel is 60 cm, calculate the speed in Km per hour in which the boy is cycling?(with solution)
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