I really need help, the problem is attached. 20 points!

Answer:
[tex]volume \: of \: the \: rectriangular \: prism = ( \frac{1}{2} \times base \times 4) \times 2 \\ 4 \times base = 40 \\ base = 10m[/tex]
Answer:
length = 15 meters
Step-by-step explanation:
Volume of a pyramid is:
V = l*w (h/3)
We know that; Volume is 40, Width is 2, and Height is 4, therefore;
40 = l*2 (4/3)
40 = 2l (4/3)
(3/4) * 40 = 2L
30 = 2L
30/2 = L
15 = L
therefore the length = 15 meters
Hope this helps!