An open box has external dimensions of 52 cm by 40 cm by 29 cm, with a wall thickness of 2 cm. If each cubic centimeter of the metal used weighs 0.5 grams, what is the total weight of the box?

Explanation

To find the weight, first calculate the volume of the metal by subtracting the inner volume from the outer volume. Multiply the metal volume by the density (0.5 g/cm³) to get the weight in grams, then convert to kilograms. The correct weight is 6.832 kg.