27. Prove that the lengths of the tangents drawl Holll a28. A container open at the top, is in the form of a frustuim of a cone of height 24 em with radi of its lowerand upper circular ends as 8 cm and 20 cm respectively. Find the cost of milk which can completely filthe container at the rate of 27 per litre. IUse π-

27. Prove that the lengths of the tangents drawl Holll a28. A containe

1.	27. Prove that the lengths of the tangents drawl Holll a28. A container open at the top, is in the form of a frustuim of a cone of height 24 em with radi of its lowerand upper circular ends as 8 cm and 20 cm respectively. Find the cost of milk which can completely filthe container at the rate of 27 per litre. IUse π-
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