Q. 164.3( 140 Votes )

How many times a wheel of radius 28 cm must rotate to go 352 m?

Answer :

It is given in the question that,

Total distance to be covered by wheel = 352 m 
                                                       = 35200 cm

Radius of wheel = 28 cm

Circumference of the circle = 2Πr

= 2 × × 28

= 2 × 22 × 4

= 176 cm

When a wheel rotates completely it covers a certain distance.

Hence it can be used to find the distance covered by a vehicle.

Also, a wheel will take certain rounds to cover some distance.

Thus,

Total distance covered by wheel = Number of rotations × circumference of wheel

Number of rotations =

= 200

∴ The wheel will rotate 200 times.

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