2015 · Q46
If three metallic spheres of radii 6 cm, 8 cm and 10 cm are melted to form a single sphere, then the diameter of the new sphere will be
Elementary MathematicsMensuration
- A12 cm
- B24 cm
- C30 cm
- D36 cm
Explanation
R³ = 6³ + 8³ + 10³ = 216 + 512 + 1000 = 1728 = 12³, so R = 12 cm and the new diameter is 24 cm (option B).