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Q.

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

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a

πd

b

4πd

c

2πd

d

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=2πd2=πd The distance covered in 1 revolution is πd cm.
Hence the correct option is 1.
 
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What is the distance travelled by a circular wheel of diameter d cm  in one revolution?