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Step-by-step explanation:
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Concept
Perimeter of a Circle
Given
Radius of Wheel = 18 cm
To find
Distance covered by wheel in 70 rotations.
Note
In one rotation, wheel cover distance equal to its perimeter.
Solving
Distance in one rotation = 2πr
Distance in one rotation = 2π * 18cm = 36π cm
Distance covered in 70 rotations = 70 * 36π cm
= ( 70 * 36 * 22 ) / 7
= 7920 cm
Answer
So, distance covered by car wheel in 70 rotations will be 7920 cm or 79.2 m.
Thank you.
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