A solid right circular cone of same circular base radius is formed by melting a solid sphere of radius 5 cm. The height of the cone is:

Calculations:

Volume of Sphere = 4/3 × πr³ = Volume of Cone = 1/3 × πr² × h

 4/3 × πr³ = 1/3 × πr2 × h

since, A solid right circular cone of same circular base radius is formed by melting a solid sphere of radius 5 cm 

∴ r is same for both.

h = 4 × 5³/5² = 20cm 

Hence, The Correct Answer is 20 cm.