what is the volume of frustum of hight 4cm, upper radius of 3cm and a lower radius of 5cm, using similar shapes method.

Question is the frustum part of a cone or a sphere?

Can we solve this using ratios of volumes?

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- Nov 13th 2010, 03:59 AMnazzvolume of Frustum using similar shapes method
what is the volume of frustum of hight 4cm, upper radius of 3cm and a lower radius of 5cm, using similar shapes method.

Question is the frustum part of a cone or a sphere?

Can we solve this using ratios of volumes? - Nov 13th 2010, 04:53 AMWilmer
- Nov 13th 2010, 01:37 PMbjhopperfrustrum of cone
Hi nazz,

1 make a sketch extending the frustrum sides to meet at apex

2 draw the altitude of the cone and id similar triangles. draw the cone diameters

3 set up an equation in which the altitude of the upper cone is x

4 solve for x

5 volume of frustrum equals volume of large cone minus volume of small cone

bjh