How many balls with a radius of 2 cm will fit into a box shaped like a cube with an edge of 20 cm?

To find out how many balls with a radius of 2 cm will fit into a box shaped like a cube with an edge of 20 cm, you need to know that the diameter of the balls is important in this task and that the cube has a length, width and height that are equal to each other.
The diameter of the balls can be found by the formula D = 2R (D is the diameter, R is the radius of the balls).
D = 2 * 2 = 4 cm.
The number of balls that fit in the length of the box is 20/4 = 5.
The number of balls that fit in the width of the box is 20/4 = 5.
And the number of balls that fit into the height of the box is also 20/4 = 5.
The total number of balls will be 5 * 5 * 5 = 125.