Q85
The radius of the base and height of a metallic solid cylinder are r cm and 6 cm respectively. It is melted and recast into a solid cone of the same radius of base. The height of the cone is :
A.
9 cm
B.
18 cm
AnswerC.
27 cm
D.
54 cm
Answer: Option B
Solution
Answer: Option B
Solution:
Let the height of the cone be h cmThen,