8. Find the cost of levelling the playground

A ground is in the shape of a parallelogram. The height of the parallelogram is 18 \(m\), and the corresponding base is 5 \(m\) longer than its height. Find the cost of levelling the ground at the rate \(₹\) 15 \(per m²\).

 

 

The total cost of levelling the parallelogram-shaped ground is \(₹\) .