Question

a rectangular plot of land is 50 m wide. the cost of fencing the plot at the rate of rupee 18 per metre is 4680.find length of plot

Answer 1

perimeter=4680/18=260m
2(l+50)=260
l+50=260/2
l=130-50=80m
hope it helps.

Answer 2

Let the length of the plot be l

2(l+b) * 18 = 4680
l+50 = 4680/2*18
l+50 = 130
l = 130-50
l= 80 cm