An open box is formed by cutting a 5 inch square measured from each corner and folding up the sides. if the volume of the carton is then 40 in3, what was the length of a side of the original square of cardboard?

So, you might be asking about Length and Width
5-inch square, measured from corner of one part, to the other,
Volume of the carton is 40 in Squared.
The original length is probably 40 in Squared divided by 5 in.
About 8.06 inches estimated.

Correct me if i'm wrong, at least i tried on this one. 

Step-by-step explanation:

Hopefully that helps!