2010 · Q72
If three cubic biscuits having edges 0-3 m, 0-4 m and 0-5 m respectively are melted and formed into a single cubic biscuit, then what is the total surface area of the cubic biscuit?
Elementary MathematicsMensuration
- A1.08 m²
- B1.56 m²
- C1.84 m²
- D2.16 m²
Explanation
Edge=∛0.216=0.6 m; surface area=6×0.36=2.16 m².