11. Four mark exercise problems III

A window is in the form of trapezium whose parallel sides are $105 \ cm$ and $50 \ cm$ respectively and the distance between the parallel sides is $60 \ cm$. Find the cost of the glass used to cover the window at the rate of $₹15$ per $100 \ sq. \ cm$.

 

Answer:

 

Area of the window $=$  $sq. \ cm$

 

The cost of the glass used to cover the window $=₹$