Question

Find the dimensions of the garden if the perimeter of the rectangle graden is640m . If the lenght of the garden is thrice its breath

Answer 1

let breath be b
l=3b
ATQ
2(3b+b)=640
=8b=640
=b=640/8
=80m
l = 3×80
=240m

Answer 2

let breadth be x then length is 3x
perimeter of rectangle = 2(l+b)
                         640     = 2(x+3x)
                         640     =2*4x
                          4x=640/2=320
                          x=320/4=80
breadth=x=80m length=3x=3*80=240m