Answer:
They built 31500 m of the road.
Explanation:
Given that,
The crew worked for 12.6 days.
The crew built 2.5 km of road each day.
We need to find the total length of the road they built. We can find the total length as follows :
L = 12.6 × 2.5 km
L = 31.5 km
or
L = 31500 m
So, they built 31500 m of road.