6. Find the cost of painting the window shade

The window sunshade is in the form of an isosceles trapezium whose parallel sides are 156 \(cm\) and 72 \(cm\) and the distance between them is 26 \(cm\). Find the cost of painting the surface at a rate of \(₹\)13 per \(cm²\).

 

 

The total cost of painting the window sunshade \(=\ ₹\).