What's the area of a 60 cm cube carton in the corner

What's the area of a 60 cm cube carton in the corner


A cube carton with 60 cm edge length is placed in the corner of the wall, and the exposed surface area is (10800 square centimeters)
Analysis: there are three surfaces exposed, 60 × 60 × 3 = 10800 (square centimeter)
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