Mensurationmedium · Past Paper
If the length, breadth, and height of a cuboid are in the ratio 3:2:1 and its total surface area is 792 sq. cm, find its dimensions.
A18, 12, 6 cm
B15, 10, 5 cm
C12, 8, 4 cm
D21, 14, 7 cm
✓ Correct Answer: A — 18, 12, 6 cm
2(3x*2x + 2x*x + 3x*x) = 792. 2(6x² + 2x² + 3x²) = 792. 22x² = 792. x² = 36. x = 6. Dimensions: 18, 12, 6.
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