Q. The ratio of the total surface areas of two spheres is 64 : 81. The ratio of their volumes is:
✅ Correct Answer: (C)
512 : 729
Explanation: Radius ratio = 8 : 9. Volume ratio = 8³ : 9³ = 512 : 729.
Explanation by: Mahesh Chandra
Radius ratio = 8 : 9. Volume ratio = 8³ : 9³ = 512 : 729.