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A square of side 3 cm is cut off from each corner of a rectangular sheet of length 24 cm and breadth 18 cm and the remaining sheet is folded to form an open rectangular box. The surface area of the box is
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- 468 cm²
- 396 cm²
- 612 cm²
- 423 cm²
- 468 cm²
Correct Option: B
Length of box = 24 –( 2 × 3) = 18 cm
Width of box = 18 – 2 × 3 = 12 cm
Height of box = 3 cm
∴ Surface area of box = 18 × 12 + 2 (12 × 3 + 3 × 18)
= 216 + 180 = 396 sq. cm