Answer:
The length of the container is
Step-by-step explanation:
we know that
The surface area of a triangular prism (a mailing container) is equal to
where
B is the area of the triangular base
P is the perimeter of the triangular base
L is the length of the container
step 1
Find the area of the base B
step 2
Find the perimeter of the base P
step 3
Find the length L of the container
we have
substitute and solve for L