Multiple choice

Three cubes each of volume (216m^3) are joined end to end. Find the surface area of the resulting figure?

  1. $216$
  2. $432$
  3. $480$
  4. $504$
  5. $550$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Volume of each cube = 216 m³, so side = ³√216 = 6 m. Three cubes joined end-to-end form a cuboid of dimensions 6m × 6m × 18m. Surface area = 2(lb + bh + hl) = 2(6×6 + 6×18 + 18×6) = 2(36 + 108 + 108) = 2(252) = 504 m². Option D is correct.