Question:The number of rounds that a wheel of diameter` 7/11` m will make in going 4 km is : 

A 1000 
B 1500 
C 1700 
D 2000 

+ Answer
D 

+ Explanation
Distance moved in 1 revolution

`= (2 xx 22/7 xx 7/22) m.`

`= 2 m.`

Number of revolutions in going 4 km

`= ((4 xx 1000)/2)`

`= 2000`

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Irin Moni

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