Question

a small cone was cut by a plane parallel to its ground from a cone 20cm height.if the volume of the short cone produced is 1\125 of the part of the original cones volume then the height of the original cone was cut off from the ground​

Answer 1

Answer:

Step-by-step explanation:

Height of the cone = 20cm

Let the small cone was cut at the height x from the top then height of the small cone = x cm

From cones ABC and AEF,

(h’, r’ and h’’, r’’ are heights and radius of larger and smaller cones resp.)

-------(i)

Given: Volume of the small cone =  × volume of the large cone

And Volume of a cone =

⇒ x = 4cm