A tent is in the shape of a cylinder, surmounted by a conical top. If the height and diameter of the cylindrical part are \(3.5 \ m\) and \(6 \ m\), and the slant height of the top is \(4.2 \ m\), find the area of canvas used for making the tent. Also, find the cost of canvas of the tent at the rate of \(₹ \)419 per \(m^2\). [Note: Use \(\pi = \frac{22}{7}\)].
Area of canvas \(=\) ____________ \(m^2\)
Cost of canvas of the tent \(Rs.\) __________