Question

The cost of fencing rectangular field at 18per mater is 1980. if the width of the field is 23m find its length

Answer 1

Given,
cost of fencing=1980
so, perimeter of rectangular field =19. 80/18
=110meter
perimeter of rectangular field=2(l+b)
110 =2(l+23)
110=2l+46
110-46=2l
64=2l
64/2=l
32=l
length of field=32