Question

What is the length of the edge of a cube if, after a slice 6 inches thick is cut from one side, the volume remaining is 400 cubic inches?

Answer 1

lwh=v
l=w=h for a cube as its' sides are all the same size?

Answer 2

does this help?

Answer 3

l=w=h=x let x = the length width and height... if you use V=BH and you cutting a 6 inch thick slice, you are effecting the height but not changing the area of the base... therefore your equation will be

(x-6)(x^2)=400

Answer 4

i keep getting a negative number

Answer 5

x^3-6x^2-400=0

?

Answer 6

how do i solve for x at this point

Answer 7

ok i got it, it's 10