Fortune Telling Collection - Horoscope - A rectangular cardboard with a length of 30 cm and a width of 18 cm is folded into a carton without a lid by cutting off squares with a side length of 6 cm at its four corners.
A rectangular cardboard with a length of 30 cm and a width of 18 cm is folded into a carton without a lid by cutting off squares with a side length of 6 cm at its four corners.
The area of cardboard for cartons is 30 *18-6 * 6 * 4 = 540-144 = 396 square centimeters;
The height of the carton is square side length, that is, 6 cm; The width is 18-6*2=6 cm; The length is 30-6 * 2 = 18cm, so the volume is 18 * 6 * 6 = 648cm3.
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