3. Five marks example problems I

The lengths of sides of a triangular field are \(28 \ m\), \(15 \ m\) and \(41 \ m\). Calculate the area of the field. Find the cost of levelling the field at the rate of \(₹ \ 20\) per \(m^2\).

 

 

The cost of levelling the field \(=\) \(₹\)