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a cube has a square hole all the way through it. if the volume of wood used to construct the cube is 3072 mm^3, what are the dimensions of the cube and the hole?

Guest Jul 21, 2017

#1**+1 **

The volume of the solid cube is given by :

(4x)^3 = 3072 mm^3 simplify

64x^3 = 3072 divide both sides by 64

x^3 = 48 take the cube root of both sides

x = ∛48 mm = 2∛6 mm

So each side of the cube is just 4x = 4 ( 2∛6 mm ) = 8 ∛6 mm

And the volume of the square hole is just the dimensions 2x * 2x * 4x

(2x)^2 * 4x = 16 x^3 = 16 ( ∛48)^3 = 16 * 48 = 768 mm^3

CPhill Jul 21, 2017