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How many square centimeters of wood should be used to make a drawer 50 cm long, 40 cm wide and 12 cm deep?
50 × 40 + 50 × 12 × 2 + 40 × 12 × 2 = 2000 + 1200 + 960 = 4160 (square centimeter) a: at least 4160 square centimeter of wood should be used
The drawer of Xiaoxiao desk is 54cm long, 42cm wide and 12cm high. How many square meters of wood should be used to make such a drawer?
54 × 42 + 42 × 12 × 2 + 54 × 12 × 2 = 4572 square centimeter = 0.4572 square meter
Xiao Ming's desk drawer is 54 cm long, 42 cm wide and 15 cm deep. How many square decimeters of wood do you need to make such a drawer?
Just calculate the area of five faces
42x54x2 + 15x42x2 + 15x54x2 = self calculation
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