Answer:
The truck will need to make 3 trips.
Explanation:
First, we need to find the volume that the truck can carry. Using the dimensions of the truck and the volume formula, we have:

Since we need to move a total of 400 cubic feet, we will divide that amount by the truckload capacity (volume).

In context, he will need to take three truck loads: two loads will be full, and the third will not be full.