Answer: 1152 in²
Explanation:
You can calculate the lateral area of a rectangular prism with the formula shown below:
![L=Ph](https://img.qammunity.org/2020/formulas/mathematics/middle-school/dqzvib2enyt57xjzi9w2rvz1c8qyszczuc.png)
Where P is the perimeter of the base and h is the height.
The formula for calculate the perimeter of the base is:
![P=2l+2w](https://img.qammunity.org/2020/formulas/mathematics/middle-school/jrrjtqbrnnug86tbamhopeqdpqvldk6qkq.png)
Then, the lateral area is:
![L=(2l+2w)h=(2*3in+2*5in)(72in)=1152in^(2)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/494ucouzaj61s2abpu339bmd72epk2ox7k.png)
(1 in=12 ft, therefore 6ft=72 in)