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Question
A cone, a hemisphere and a cylinder have the same base. The ratio of their volumes is 3:21. Then, the height of the cone: radius of the hemisphere : height of the cylinder is equal to?
एक शंकु, एक अर्द्धगोला और एक बेलन का आधार समान है उनके आयतनों में अनुपात 3:2:1 है तो शंकु की ऊँचाईः अर्द्धगोले की त्रिज्या बेलन की ऊँचाई बराबर है?
A.
6:3:1
B.
1:6:3
C.
9:6:1
D.
9:3:1
Answer ( Option D)

9:3:1

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