Answer:
256 ft²
Step-by-step explanation:
where l is length and w is width and h is height
Plug in the given information

Therefore, the surface area of the rectangular prism is 256 ft².
I hope this helps!
Sum of infinite series of a GS is a1 / (1-r)
so here it is 65 / (1 - 1/6) = 65 / 5/6 = 65*6 / 5 = 78 answer