4. Determine the cost of aluminium foil used in sweet

A Kaju katli has a diagonal of 8 \(cm\) and 12 \(cm\). The top surface of Kaju katli should be covered by aluminium foil. Find the cost of aluminium foil used for 450 pieces of Kaju katli at the rate of \(₹\)4 per \(50 cm²\).

 

 

The cost of aluminium foil used in450 Kaju katli is \(₹\).