Question

The diameter of Jen’s bicycle tire is 45cm. About how many revolutions (times around the circumference) will her tire make in a 25,000 cm journey?

Answer 1

176.8 revolutions

Explanation:

1) Find the circumference of the tire. Since C = πd, we have C = π(45 cm).

2) Divide 25,000 cm by this 45π cm:

25000 cm 555.6 revolutions)

----------------- = ----------------------------- = approximately 176.8 revolutions

45π cm π