Milk in a container, which is in the form of frustum of a cone of height 30 cm and the radii of whose lower an upper circular
ends are 20 cm and 40 cm respectively, is to be distributed in a camp for fl ood victims. If this milk is available at the rate
of `35 per litre and 880 litre of milk is needed daily for a camp, fi nd how many such containers of milk are needed for a
camp and what cost will it put on the donor agency for this.
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