Question

A rectangular land length is 20m greater than bredth periemeter 280 fing length??

Answer 1

let the length of the land be l and breadth be b.
so l = b + 20
l- b = 20 ......1
2l + 2b = 280
l + b = 190........2
on equating
2l = 210
l = 105 m
b = 85 m
so the length is 105m and bradth is 85 m

Answer 2

consider breadth=x
     then length=x+20
     perimeter=2(l+b)
     then 2(x+20+x)=280
           2(2x+20)=280
           2x+20=140
           2x=120
             x=60
therefore breadth(x)=60
so length=(x+20)=80