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Q.

The radius of a circular wheel is 42cm, then find the distance traveled by it 200 revolutions in m.


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a

528

b

500

c

620

d

680 

answer is A.

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Detailed Solution

Concept- By using the formula Question Image, where r is the radius and it isQuestion Image, to determine the circumference of the wheel, we may first determine the distance covered in one rotation. To determine the distance traveled, multiply the distance covered in one revolution by 200. In the end, multiply it by 100 to get the distance in meters.
The wheel travels one circumference's worth of distance in a single rotation.
circle's circumference Question ImageTravel distance after 200 revolutions Question ImageHence, the correct answer is option 1) 528
 
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