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Solution


Q.

The number of revolutions made by a circular wheel of radius 0.25m in rolling a distance of 11km is
1 2800  
2 4000  
3 5500  
4 7000  

Ans.

(4)

Since, radius of wheel (r)=0.25m

Total distance covered by a circular wheel = 11 km = 11000 m

⇒No. of revolutions×2πr=11000

⇒No. of revolutions=11000×72×22×0.25=7000