Area of rectangular field = L * B = 20 * 16
= 320 m2
The lawn leaves 2 m broad path all around. So, the lawn's dimensions will be 18 m and 14 mSo, area of lawn = 18 m * 14 m = 252 m2
So, the area of path = area of whole field - area of lawn= 320 m2 - 252 m2
= 68 m2
The cost of paving the path will be 68 * 20 =1360 Rupees.