ANSWER
V = 720 cubic feet
EXPLANATION
The dimensions of the bed of the truck are 15 feet, 8 feet and 6 feet.
From the description of the bed, it is a rectangular prism.
The volume of a rectangular prism is given as:
[tex]\begin{gathered} V\text{ = L }\cdot\text{ W }\cdot\text{ H } \\ \text{where L = length, W = width, H = height} \end{gathered}[/tex]Therefore, the volume of the bed is:
[tex]V\text{ = 15 }\cdot\text{ 8 }\cdot\text{ 6 = 720 cubic feet}[/tex]