A milk container of height 16 cm is made of metal sheet in the form of a frustum of a cone with radii of its lower and upper ends as 8 cm and 20 cm, respectively. Find the cost of milk at the rate of ₹22 per L which the container can hold.

Explanation

To solve the problem step by step, we will calculate the volume of the frustum of the cone and then determine the cost of the milk that the container can hold.

### Step 1: Identify the given values
- Height of the frustum (h) = 16 cm
- Radius of the lower end (r1) = 8 cm
- Radius of the upper end (r2) = 20 cm

### Step 2: Use the formula for the volume of a frustum of a cone
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