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Jamie just bought two boxes. The first box is square, with each side measuring 10 units, and is 4 units high. The second box is rectangular and has twice the volume of the square box. If the height of the second box is 5 units, and the width is 10 units, what is the length of the second box?

  1. 12 units

  2. 16 units

  3. 20 units

  4. 24 units

The correct answer is: 12 units

The correct way to approach this problem is to first find the volume of the square box, which is 10 units x 10 units x 4 units = 400 units^3. Then, since the second box has twice the volume, its volume would be 2(400) = 800 units^3. To find the length of the second box, we can divide its volume by the product of its height and width 800/(5 x 10) = 16 units. The other options, B, C, and D, are incorrect because they do not take into account the height or width of the second box and are not related to the given dimensions of the square box.