A uniform solid right circular cone of base radius r is joined to a uniform solid hemisphere of radius r and of the same density, so as to have a common face. The center of mass of the composite solid lies on the common face. The height of the cone is
A
2r
B
r
C
3r
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Volume of cone= 
Mass of cone, 
Mass of hemisphere, 
Now, 
or 
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