The volume of a cube (where all sides are equal length) is the length3. In other words length x length x length.
Your answer is 20 x 20 x 20 = 8,000cm3
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The length of a side (edge) of a cube is equal to the cube root of the volume. So, in this case the cube root of 125 is 5. Thus, each edge of the cube is 5 cm long.
Oh, dude, it's like you're asking me to do math or something. So, the volume of a cube is side cubed, right? So, to find the length of one edge, you just gotta take the cube root of the volume. In this case, the cube root of 125 is 5, so each edge of the cube is 5 cm long. Easy peasy!
it is square root 45
0.10
.10g/cm3