
Son T. answered 10/11/19
Tutor
5
(47)
Math. and Electrical Engineering
A rectangular box with a volume 40ft^3 has a square base which the side (of base) is called s.
The surface of base : S = s^2
With the length X, a function can be written as: X s^2 = 40 ==> X = 40 / s^2