Question

A wet bicycle tire leaves a trace of water on the floor. The tire has a radius of 30 cm, and the bicycle wheel

makes 3 full rotations before stopping.
How long is the trace of water left on the floor?
Round your answer to the nearest cm.

Answer 1

The trace of the water left on the floor is 566 cm.

Explanation:

The bicycle wheel has a circular shape, therefore;

1 revolution is the same as the circumference of the wheel. So that 3 revolutions is the same as multiplying the circumference of the wheel by 3.

circumference = 2
`\pi`r

where r is the radius of the wheel (r = 30 cm).

Thus,

circumference = 2 x
`(22)/(7)` x 30

=
`(1320)/(7)`

circumference = 188.57 cm

3 revolutions = 3 x 188.57

= 565.71 cm

Therefore, the trace of the water left on the floor is 566 cm.