Question

A wet bicycle tire leaves a trace of water on the floor. The tire has a radius of 30 and the bicycle wheel makes 333 full rotations before stopping. How long is the trace of water left on the floor?

Answer 1

The trace of water left on the floor = 627.69 m

Explanation:

The length of the trace of the water = circumference of the bicycle tire

Radius, r = 30 cm

Circumference = 2πr

Circumference = 2 * π * 30

Circumference = 60π

Since the tire makes 333 full rotations

The circumference = 60π * 333

The circumference = 62769.02 cm = 627.69 m

The trace of water left on the floor = 627.69 m

Answer 2

The trace of water left on the floor is 62769 cm long.

Explanation:

I will assume that the tire has a radius is 30 cm. The tire perimeter is
`2* \pi * r = 2 \, \pi \, 30 = 60` cm. Since the bycicle makes 333 rotations, then the tire will leave a trace of length 333 times the perimeter of the tire, in other words, it will leave a trave of 333*60 π = 62769 cm.