4 A container, opened from the top and made up of a metal sheet, is in the form of afrustum of a cone of height 16 รงm with radii of its lower and upper ends as 8 cm and 20cm, respectively. Find the cost of the milk which can completely fill the container, at therate of 20 per litre, Also find the cost of metal sheet used to make the container, if itcostst 8 per l 00 cnr. (Take-3.14)

4 A container, opened from the top and made up of a metal sheet, is in

1.	4 A container, opened from the top and made up of a metal sheet, is in the form of afrustum of a cone of height 16 รงm with radii of its lower and upper ends as 8 cm and 20cm, respectively. Find the cost of the milk which can completely fill the container, at therate of 20 per litre, Also find the cost of metal sheet used to make the container, if itcostst 8 per l 00 cnr. (Take-3.14)
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