Question

A wheel has diameter 7 cm how many complete Revolution must it take to cover 660 metre
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Answer 1

Answer:

Circumference of a circle, the entire external length of the circle(the wheel)

=π x d, where π =3.142 and d is the diameter

In this case, the diameter = 7cm, now we need to convert to metres to keep all units consistent(with the distance of 660m)

so the diameter=7cm

Circumference in this case, using above formula=3.142x7=21.994

For a distance of 660m, the revolutions would be 660/21.994=30 or approx.31

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