Clearly, Given container is in the form of frustum of a cone.
As we know
Volume of frustum of a cone
Where, h = height, r1 and r2 are radii of two ends (r1 > r2)
or given bucket,
Radius of lower end, r2 = 8 cm
Radius of upper end, r1 = 20 cm
Height of container, h = 16 cm
Using these values,
We have.
⇒Volume = 10459.42 cm3
As 1000 cm3 = 1 L
10459.42 cm3 = 10.45942 L = 10.46 L [Appx]
Also,
Cost for 1 L milk = 22 Rs
Cost for 10.46 L milk = 22(10.46) = 230.12 Rs