A drinking glass is in the shape of a frustum of a cone of height 14 cm.The diameter of its two circular ends are 4 cm and 2 cm respectively.Find the capacity of the glass.

Explanation

The volume of a frustum can be given as

`V = (pi h)/3(R^2+Rr+r^2)`

Here, `h = 14` cm, `R =4/2 = 2` cm, `r = 2/2 = 1` cm

`: V = 22/7**14/3(4+2+1)`

`V = (44**7)/3 = 308/3cm^3`.

So, capacity of the given glass is `308/3 cm^3`.