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A joker’s cap is in the form of a right circular cone of base diameter 40 cm and height 21 cm. Find the cost of the paper to make the joker’s cap if the cost of 100 \ cm^2 canvas is 150.
(Use \sqrt{3} = 3.14)
 
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Cost of the paper to make the joker’s cap =
 
[Note: Round off your cost to the whole number]
1