The diameter of a wheel of a bus is 90 cm which makes 315 revolutions per minute. Determine its speed in kms per hour.

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Solution

The diameter of a wheel of a bus is 90cm ,so radius=45cm
=>circumference=2πr

. =222/745

. =222/745/100000

(converting it in kilometres)

Now,revolution per minute are 315...

=>222/745/100000315

=222/745/100000315*60

(per minute)

=>37422000/700000

=>53.46 km/h!!!

R

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The diameter of a wheel of a bus is 90 cm which makes 315 revolutions per minute. Determine its speed in kms per hour.

The diameter of a wheel of a bus is 90cm ,so radius=45cm =>circumference=2πr . =2*22/7*45 . =2*22/7*45/100000 (converting it in kilometres) Now,revolution per minute are 315... =>2*22/7*45/100000*315 =2*22/7*45/100000*315*60 (per minute) =>37422000/700000 =>53.46 km/h!!! R

The diameter of a wheel of a bus is 90cm ,so radius=45cm
=>circumference=2πr

. =222/745

. =222/745/100000

(converting it in kilometres)

Now,revolution per minute are 315...

=>222/745/100000315

=222/745/100000315*60

(per minute)

=>37422000/700000

=>53.46 km/h!!!

R