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Pack two cubes of soap 10 cm long, 7 cm wide and 5 cm high into a packed volume

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Pack two cuboid soaps with a length of 10 cm, a width of 7 cm and a height of 5 cm. How many cubic centimeters is the best volume and how many square centimeters of wrapping paper are needed?

put one piece of soap flat and stack the other on it, that is, the length and width of the synthetic cuboid remain the same, and the height is doubled to 10cm, so as to save packaging paper
the volume is 10 × seven × five × 2 = 700 (cm3)
surface area = (10) × 7+10 × 10+7 × 10) × 2
= 480 (square centimeter)
answer: the packaged volume is 700 cubic centimeter, and at least 480 square centimeter of wrapping paper is required.

solution: 10 * 7 * 2 + 10 * 10 * 2 + 10 * 7 * 2
= 140 + 200 + 140
= 480 (cm2)
answer: at least 480 cm2 of wrapping paper is required

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