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Solution


Q.

The radius of the largest right circular cone that can be cut out from a cube of edge 4.2 cm is
1 2.1 cm  
2 4.2 cm  
3 3.1 cm  
4 2.2 cm  

Ans.

(1)

The diameter of the largest right circular cone that can be cut out from a cube of edge 4.2 cm.

∴  2r=4.2 cm⇒r=2.1 cm

⇒ Radius of the largest right circular cone = 2.1 cm.