Question

perimeter of rectangular field is 156m and it's breadth is 34m find it's length

Answer 1

p = 2(l+b)
156 = 2(l+34)
156 = 2l + 68
2l = 156 - 68
    = 88
l = 88/2 = 44

Answer 2

perimeter= 2( length+ breadth)
156=2*34+2*breadth
156-68=2*breadth
88/2= breadth
breadth=44