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Q.

A hollow sphere of external and internal diameter 8cm and 4cm respectively is melted into a solid cone of base diameter 8cm. Find the height of the cone.


Class: Grade 9


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a

  14cm

b

  16cm

c

  18cm

d

  20cm  

answer is A.

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Detailed Solution

External radius of hallow sphere R1 = Question Image= 4cm
Internal radius of hallow sphere R2 = Question Image= 2cm
Radius of the cone r = Question Image= 4cm
Volume of cone = Volume of Hallow sphere
Question ImageQuestion ImageQuestion ImageQuestion ImageHeight of the cone is 14cm.
   
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