4. Find the area of the canal and also total cost require for to construct canal

A canal of width 3 m is constructed all along inside the field which is 31 \(m\) long and 16 \(m\) wide. Find the area of the canal and the total cost of constructing the canal at the rate of \(₹\) 16 \(per sq. m\).

 

 

The area of the canal is $m^2$.

The total cost of constructing the canal at the rate of\(₹\) 16 per sq. m is \(₹ \).