Question

the cost of fencing a rectangular field at rupees 24 per metre is rupees 1920 if its length is 23 M find its breadth

Answer 1

firstly we have to find perimeter
fencing means perimer
if one metre cost rupees 24 then fencing =1920÷24=80
therefore perimeter = 80
80 =2 (l +b )
on solving ans =17 m

Answer 2

See the pic it will help you.