The radius of each wheel on a bicycle is 0400 m The bicycle

The radius of each wheel on a bicycle is 0.400 m. The bicycle travels a distance of 3.0 km. Assuming that the wheels do not slip, how many revolutions does each wheel make?
(a) 1.2

Solution

The radius of each wheel = .4 meters

The circumference of each wheel = 2*pi*r = 2*pi*.4 = 2.513274123 meters.

The bicycle travels 3 kilometers.

The number of meters in a kilometer is equal to 1000.

The bicycle travels 3 * 1000 = 3000 meters.

Each revolution of the bicycle wheel covers 2.513274123 meters.

The number of revolutions of each wheel of the bicycle equals 3000 / 2.513274123 = 1193.662073

This is close to 1200 revolutions.

1200 is equivalent to 1.2 * 10^3

The closest answer would be (a).