A wheel having radius 50cm rotates 280 times in 1 minute. Find out the speed of the wheel in km/hr.
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1
Answer:
47.52
Given,
r=21cm
So, distance covered in one rotation is 2πr
= 2*3.14*21
= 131.88cm
Rpm =600
So
Distance covered in a minute
= 600*131.88
= 791.28m/min
Convert this to kmph
=(791.28/1000)/(1/60)
=47.5 kmph
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