<h2>
Answer:</h2>
The length of each row in the facility is:
60 feet
<h2>
Step-by-step explanation:</h2>
Let s denote the length of each of the storage unit.
Hence, the volume of each of the storage unit which are in the shape of a cube is given by:

Based on the information we have:

Hence, the length of each of the storage unit is : 5 feet
Also,
There are 12 identical storage units in each row of the facility.
This means that the total length of row= 12×Length of one unit
i.e.
Total length of row= 12×5
i.e.
Total length of row= 60 feet