The diameter of the wheel of a vehicle is 5m. It makes one revolution in 9 seconds. What is speed of the vehicle in km/h?

2π

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3π

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4π

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Solution

The correct option is A
2π

Distance covered in 9 seconds = $5 π$
Thus speed $= \frac{5 π}{9} m / s e c$
$= \frac{5 π}{9} \times \frac{60 \times 60}{1000} = k m / h r = 2 π k m / h r$

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The diameter of the wheel of a vehicle is 5m. It makes one revolution in 9 seconds. What is speed of the vehicle in km/h?

The correct option is A 2π Distance covered in 9 seconds = 5π Thus speed =5π9m/sec =5π9×60×601000=km/hr=2π km/hr

The correct option is A
2π

Distance covered in 9 seconds = $5 π$
Thus speed $= \frac{5 π}{9} m / s e c$
$= \frac{5 π}{9} \times \frac{60 \times 60}{1000} = k m / h r = 2 π k m / h r$