The radius of a wheel is 0.42 metre. It takes 750 rotation in a minute. Its speed will be equal to
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Explanation:
Radius = 42cm.
No of revolution = 750 / min
No of revolution = 750× 60 / hour
Now,
Circumference = 2 π r
⇒ 2 × 22 / 7 × 42
⇒ 44 × 6
⇒ 264cm
We have ,
no. of revolution= circumference/distance
⟹distance=750×60×264
⟹distance=11880000cm
⟹distance= 11880 km
∴distance=11880km
Speed = distance / time
⇒ speed = 11880km / 1 hour
⇒ speed = 11880 km/hr.
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