The perimeter of a square hall is 144 \(m\). Find the area and the total cost of cementing the square hall at a rate of \(₹\)5 per \(m²\).
Side of a square hall \(=\) \(m\)
Area of a square hall \(=\) \(m²\)
The total cost of cementing the square hall \(=\) \(₹\).