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Question

A bicycle wheel has a diameter of 7 cm. What distance does the wheel cover on the ground if it completes 1 full rotation?

(Take π=227)


A

44 cm

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B

22 cm

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C

21 cm

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D

42 cm

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Solution

The correct option is B

22 cm


1 complete rotation = circumference of the wheel =2×π×r [where, r is radius]

So, Distance covered =π×d [As d=2r, where, d is diameter]

=227×7

Distance covered =22 cm


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