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What is the distance travelled by a circular wheel of diameter $d cm$ in one revolution?

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πd

4 πd

2 πd

None of these

answer is A.

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Detailed Solution

Given that, a circular wheel of diameter

d

cm travelled one revolution.
Determine the radius r of the circle by dividing the diameter d by 2.

r = d 2

Determine the circumference of the circle to determine the distance covered in 1 revolution.

C = 2 π \frac{d}{2} = πd

The distance covered in 1 revolution is

πd

cm.
Hence the correct option is 1.

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