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Standard IX
Mathematics
Question

A hollow cone is cut by a plane parallel to the base and the upper portion is removed. If the curved surface of the remainder is 89 of the curved surface of wholecone, find the ratio of the line-segment into which the cone's altitude is divided by the plane
  1. 12
  2. 13
  3. 23
  4. 15

A
13
B
23
C
12
D
15
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