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A bicycle wheel of radius 35 cm is making 25 revolutions in 10 seconds. At what speed in

km/hr is the cycle moving ?

@ Kishan: Good attempt. Keep it up. Keep posting!
@ Mathew: Your friend Kishan has correctly answered the question asked by you. Hope the explanation helps you!

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thanks dude

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 welcome

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The answer is wrong..

speed=distance/time

time=10 seconds

circumference of the wheel=2 pi r

=2*22/7*35

=2*22*5

=220cm.

dist. travelled= 220*25

=5500 cm =55 m

speed= D/T

=55/10

=5.5 m/s

=5.5*18/5

=19.8 km/hr.

Therefore the bicycle is moving at a speed of 19.8 km/hr

  • 10

speed = distance/ time

circumference = 2 pi r

= 2* 22/7 * 35

= 210 cm

distance = 210* 25 (revolution)

=525 cm =5.25m

time = 10sec

speed = 5.25m / 10 = 0.525m/s

= 525mm/s

therefore the speed of the bicycle is 525mm/sec

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