Geometry

Question Analysis  
This question tests similarity of cones by comparing ratios of corresponding linear dimensions (radius and height).
The main focus is on using consistent dimensions (radius & height vs. radius & slant height).  

Key Concept Explanation  
Similar cones require equal ratios of corresponding linear dimensions (e.g., radius to radius, height to height, or slant height to slant height).
Mixing dimensions (e.g., radius to slant height) is invalid.  

Step-by-Step Solution  
1. For Cone B, calculate height using Pythagoras’ theorem (since slant height is given):  
  cm  
2. Compare radius ratios: