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Baba Shankateswar Samantaray

· started a discussion

· 1 Months ago

how square of r becomes cube of r in the solution. (Question: 249107.0 )

Please clarify

Question:
The height of the cone is 60 cm. A small cone is cut-off at the top by a plane parallel to the base and its volume is \(\cfrac{1}{125}\) th volume of original cone. What is the height of the smaller cone? 
Options:
A) 15 cm 
B) 48 cm 
C) 45 cm 
D) 12 cm 
Solution:

Ans: (d) 


Kamaal Akhtar

· commented

· 1 Months ago

Both cones are similar so you can use similar triangle property to obtain r/h = R/H
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