An ice-cream seller has two types of ice-cream containers one in the form of a cylindrical shape and another in the shape of a frustum. Both have the same height 7cm and the diameter of cylindrical container is 7cm. Upper and lower radii of frustum are 3.5cm and 3cm respectively. 

(i) Calculate the volume of both the containers

(ii) If the cost of the containers is te same and the seller prefers to sell ice-cream in the cylindrical container, then which value is depicted by the seller

Do not link another topic.