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. The capacity of the glass is 10223 cm3.
Height of frustum of cone = h = 14 cm
Radius of one end = r1=1 cm
Radius of the other end = r2=2 cm
Volume of frustum of cone =
13 π.h((r1)2+(r2)2+(r1)(r2))
=13×227×14(12+22+(1)(2))
=13×227×14×7=3083=10223 cm3