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A circle is the locus of a point such that its distance from a fixed point which is its center is always constant.
The circumference of a circle is the perimeter of the circle, that is it is the arc length of the circle as if it was opened up and straightened out.
The tire has the shape of a circle, therefore the distance the tire covers during one revolution is the same as the circumference of the tire. The circumference is given by:
Circumference = 2πr;
where r is the radius of the tire
Let us assume that the tire has a radius of 14 cm. Hence:
Distance covered after 1 revolution = 2π(14) = 88 cm
The distance covered after the tire is pushed 5 times = 5 * 88 cm = 440 cm

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