A rectangular field has length is 45m and breath is 35m.there is a road 5m outer side of the rectangle. How much it cost to plant trees in the road. If the cost per metre is RS 15
The length of the road is the perimeter of the field. So the cost to plant it is perimeter*cost/meter:
2(45+35)*15
Of course, that is the length of the inside of the road. If the trees are planed more toward the outside, then the length will be greater...