A rectangular cardboard, 10 cm long, 8 cm wide, four corners each cut out a side length of 2 cm square, folded into an open box, its volume A rectangular sheet of iron, 10 cm in length and 8 cm in width, with four corners each cut off, is a square box with a side length of 2 cm [Note: it's a cube! Not a square]. What's the volume of the box? How big is the sheet of iron?

A rectangular cardboard, 10 cm long, 8 cm wide, four corners each cut out a side length of 2 cm square, folded into an open box, its volume A rectangular sheet of iron, 10 cm in length and 8 cm in width, with four corners each cut off, is a square box with a side length of 2 cm [Note: it's a cube! Not a square]. What's the volume of the box? How big is the sheet of iron?


Length: 10-2 = 8cm width: 8-2 = 6om height: 2cm volume: 8 × 6 × 2 = 96cm3
Surface area (8 × 6 + 8 × 2 + 2 × 6) × 2-6 × 8 = 98cm2

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