A cube is partially filled to the top with 4 mm3 of water. If the water is 1 mm high, what is the length of one side of the cube?

1 mm

2 mm

3 mm

4 mm

Your answer would be 2 mm. The formula for volume is v=lwh

You have the volume: 4mm. And you have the height: 1. Substituting the known values you have 4 = (1) (x) (x).

Now the question is, 1 times what 2 numbers gives you 4? Well 2 does.

4 = (1) (2) (2)

The rest of the numbers don't work. 1 times 1 times 1 is 1. 1 times 3 times 3 is 9. And one times 4 times 4 is 16.