A composite figure is formed from a cone and a cylinder with the same base radius, and its volume can be calculated by multiplying the volume of the cylinder by a rational number, a/b. What arrangements of the cylinder and cone could explain this?

Respuesta :

The composite figure comprises of a cone balanced on top of  cylinder

Step-by-step explanation:

The composite figure is formed from a cone and a cylinder with the same base radius, Let the base radius be r

Then the volume of the cone will be [tex]V_{cone}[/tex]

Then the volume of the cylinder will be [tex]V_{cylinder}[/tex]

[tex]V_{cylinder} = \pi r^{2} h_{cylinder}[/tex]

The total volume of the composite figure will be V, where

[tex]V= V_{cone} + V_{cylinder}[/tex]

[tex]V = \frac{1}{3} \pi r^{2} h_{cone} +\pi r^{2} h_{cylinder}[/tex]

let the height of cone and cylinder be same

The volume of the composite figure will be [tex]\frac{4}{3} \pi r[/tex][tex]r^{2} h[/tex]

Hence [tex]\frac{4}{3} = \frac{a}{b}[/tex]

Thecomposite figure comprises of a cone balanced on top of  cylinder