12. Five mark exercise problem IV

A container open at the top is in the form of a frustum of a cone of height 16 \(cm\) with radii of its lower and upper ends are 8 \(cm\) and 20 \(cm\) respectively. Find the cost of milk which can completely fill a container at the rate of \(₹40\) per litre.

 

Answer:

 

Cost of milk that will fill the container \(=\) \(₹\)

 

[Note: Round off the cost to two decimal places.]