7. Evaluate the cost of the paper to make the joker's cap

A joker’s cap is in the form of a right circular cone of base diameter 24 \(cm\) and height 16 \(cm\). Find the cost of the paper to make the joker’s cap, if the cost of \(100 \ cm^2\) canvas is \(₹\)140.

\((\)Use \(\sqrt{3} = 3.143)\)

 

 

Cost of the paper to make the joker’s cap \(=\) \(₹\)

 

[Note: Round off your cost to the whole number]