Question

the road roller makes 200 rotation in covering 2200.Then the radius of the roller is

Answer 1

hello.
here is your answer ...

= distance / No. of rotations
= 2200/200=11

2πr=11
2*22/7*r=11
44/7*r=11
r = 11*7/44
r = 7/4
r = 1.75 m
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Answer 2

Since,

The road roller covers 2200 m in 200 rotations

It will cover 2200/200 i.e. 11 m in 1 rotation

Hence,

Circumference of the roller = 11 m
Therefore,

Let the radius be ' r '.

Also,

Circumference of roller = 2 π r
11 = 2 * ( 22 / 7 ) * r
r = 11 / 2 * 7 / 22
r = 7 / 4

On simplifying,

r = 1.75 m

Hence,

Radius of roller = r = 1.75 m

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