A construction crew has just built a new road. They built 156.25 kilometers of road at a rate of 5 kilometers per week. How many weeks did it take them?

31 and a quarter week (31.25)

Step-by-step explanation:

First find the rate. There is no need to do cross multiplication because it's already a unit rate (per 1 week).

2. Divide

156.25 / 5 = 31.25

3. Answer

31.25 weeks