2012 · Q10
What are the dimensions (length, breadth and height respectively) of a cuboid with volume 720 cubic cm, surface area 484 square cm and the area of the base 72 square cm?
Elementary MathematicsMensuration
- A9, 8 and 10 cm
- B12, 6 and 10 cm
- C18, 4 and 10 cm
- D30, 2 and 12 cm
Explanation
Height = 720/72 = 10 cm. Then lb = 72 and 2(72 + 10(l+b)) = 484 gives l+b = 17, so l = 9 and b = 8.