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A bucket made up of a metal sheet is in the form of a frustum of cone . its depth is 24 cm and the diameters of the top and bottom are 30 cm and 10 cm

respectively.Find the cost of milk which can completely fill the bucket at the rate of Rs 50 per litre.


Volume of frustum =1/3πh[r1²+r2²+r1r2]
= 1/3π*24[225+25+75]
=8171.428 cm³
1000cm³= 1 litre
8171.428 cm³=8.171 litre.
1 litre = Rs 50
8.171 litre = 8.171*50
= Rs 408.55
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