Question

You are going on a field trip in a school bus. A special detector placed on one of the bus's tires counts the number of rotations completed by the tire during the journey. The tire's diameter is 1 meter, and it made 8000 rotations during the trip.

How far did the bus travel?

Answer 1

25,133 m or 25.1 km

Explanation:

The circumference of the tire is ...

C = πd

C = π(1 m)

The distance the bus traveled is 8000 times this far, so is ...

distance = (8000)(π m) = 8000π m

Using 3.14159 for π, we find the distance to be about

distance = (8000)(3.14159) m ≈ 25,133 m

The bus traveled about 25,133 meters

Hope this helps ;)

Answer 2

25,133 m or 25.1 km

Explanation:

The circumference of the tire is ...

C = πd

C = π(1 m)

The distance the bus traveled is 8000 times this far, so is ...

distance = (8000)(π m) = 8000π m

Using 3.14159 for π, we find the distance to be about

distance = (8000)(3.14159) m ≈ 25,133 m

The bus traveled about 25,133 meters or 25.1 km.