Question

Length of a rectangle exceeds it breadth by 4m if the perimeter of the rectangle is 84m.find the length and breadth of the rectangle

Answer 1

let the breadth be x =b
the length becomes x+4 =l

perimeter= 2l+2b= 2(x+4)+2x
= 4x+8=84
x=19=breadth
y=19+4=23=length

Answer 2

x
$2(l + b) = 84$
and
$(l + 4) = b$
hence
$l = b - 4$