2014 · Q41
If 64 identical small spheres are made out of a big sphere of diameter 8 cm, what is the surface area of each small sphere?
Elementary MathematicsMensuration
- Aπ cm^2
- B2π cm^2
- C4π cm^2
- D8π cm^2
Explanation
Small radius = 4/4 = 1 cm; surface area = 4π(1)^2 = 4π cm^2.