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Q.

The number of times a wheel of radius 28 cm must rotate to go 352 m is[[1]].
 


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Detailed Solution

The number of times a wheel of radius 28 cm must rotate to go 352 m is 200.
Given the distance is 352 m and the radius of wheel is 28 cm.
Circumference = 2πr
=2× 22 7 ×28 =176 cm
Now, since a wheel have to go 352m and it can go 176cm in one rotation,
We have to divide both to get the number of rotations
Since, distance is in m we have to convert it into cm.
= 352×100cm
= 35200cm
Rotations required is
= 352×100 176
= 200
Rotation to go 352 m is 200.
 
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