The correct answer for the question that is being presented above is this one: "9 inches; 441 in^2"
The volume of a square prism is
Volume = s^3 = lwh
Given that the volume is 810 in^3 and the height is 10 inches
810 = 10 * s^2
81 = s^2
s = 9 inches
So, the length of each side of the base is 9 inches
Then, the total area used in order to make a cardboard is that,
= 9^2 + 4 ( 10*9)
= 81 + 4(90)
= 81 + 360
= 441 square inches.
