Question

the height of a cone is 30cm.a small cone is cut off at the top by a plane parallel to the base.if its volume be 1/27 of the vloume of the given cone at what height above the base is the section mode?FAST PLZZZ

Answer 1

Given height of the cone = 30 cm
Let the small cone is cut off at a height ‘h’ from the top
Let the radius of big cone be r1 and small cone be r2.
Volume of the big cone, 

ΔACD ~ ΔAOB [AA similarity criterion]

Thus at a height 20 cm above the base a small cone is cut.

Answer 2

Answer:

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