If the material expands by 25%, how much can the scraper effectively move in one hour for a round trip of one mile?

To determine the effective amount of material a scraper can move in one hour for a round trip of one mile, consider the impact of the material expansion factor. If the material expands by 25%, the effective volume being moved is adjusted accordingly.

Let's assume that, without expansion, the scraper has a capacity of a certain cubic yardage per trip. When the material expands by 25%, it means that for every cubic yard, the scraper can only effectively transport approximately 0.8 cubic yards of that expanded material (since 1 cubic yard divided by 1.25 equals 0.8 cubic yards).

If the total distance of a round trip is one mile, we also need to take into account the time required to make that trip. Assuming a scraping and loading cycle allows for the movement of a certain number of cubic yards per trip, you calculate how much can be moved in one hour.

In the given scenario, if option B states that the scraper can efficiently move 80 cubic yards after accounting for the 25% expansion, this means the scraper effectively adjusts its operation to maintain productivity under changed conditions, ensuring that the capacity aligns with the reduced effective volume due to expansion.

Thus, under the outlined conditions and with proper calculations regarding