They are not proportional
Answer:
The height is 2 units
Step-by-step explanation:
Find the area of the base of the square pyramid
we know that
The volume of the square pyramid is equal to

where
B is the area of the base and H is the height of the pyramid
we have


substitute in the formula and solve for B


step 2
Find the height of the square prism
we know that
The volume of the square prism is equal to

where
B is the area of the base and h is the height of the prism
we have


substitute in the formula and solve for h


40 divides by 31 = 1.29 which is 1 1/3 cup per day
1.29 x 6 days = 7.74 cans
About 7 3/4 cans in 6 days