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anmol tyagi

· started a discussion

· 1 Months ago

wrong question (Question: 277545.0 )

The CSA of the remaining portion can never be greater than the CSA of the original cone. Hence, CSA of the remaining portion must be 8/9[not 9/8] of the original cone.

Question:

A hollow cone is cut by a plane parallel to the base and the upper portion is removed. It the curved surface of the remainder is  \(\frac{8}{9}\)   times of the curved surface of the whole cone, find the ratio of line-segment into which the cone's altitude is divided by the plane.

Options:
A)

12    

B)

13    

C)

23    

D)

15    

Solution:

Ans: (a)

  

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