2014 · Q47
The volume of a hollow cube is 216x^3. The surface area of the largest sphere which can be enclosed in it is
Elementary MathematicsMensuration
- A18πx^2
- B27πx^2
- C36πx^2
- D72πx^2
Explanation
Cube side 6x; sphere diameter 6x, radius 3x; area 4π(3x)^2 = 36πx^2.