7. Find the cost of levelling the field

A field is in the form of an isosceles trapezium with parallel sides measuring 98 \(m\) and 140 \(m\) long. The distance between the parallel sides is 32 \(m\). Find the cost of levelling it at the rate of \(₹\)77 per \(m²\).

 

 

The total cost of levelling the ground \(=\ ₹\).