Question

Length of a rectangle exceeds its breadth by 4m.if the perimeter of a rectangle is 84m, find it's length and breadth?

Answer 1

let b=xm

l= x+4m

given perimeter of rectangle=84m

perimeter of rectangle = 2 (l+b)

84=2 (x+4 +x) m

84=2 (2x+4)

2x+4=84÷2

2x=42_4

x=38÷2=19