Question

The perimeter of a rectangular field is 320 m. If the length and breadth are in the ratio 5 : 3, calculate the length and breadth.

Answer 1

Let the length be 5x

Breadth 3x

Perimeter =2(l+b)

2(8x)

16x

Perimeter =320

16x=320

x=320/16

x=20

Length =20*5=100

Breadth =20*3=60

Answer 2

Let the length and breadth of the rectangle
= 5x and 3x

Perimeter of the rectangle= 320
2(l+b) = 320
2(5x+3x) = 320
10x+6x = 320
16x = 320
x= 320/16

x= 20

Length of the rectangle = 5x
5*20= 100m

Breadth of the rectangle = 3x
3*20= 60

$answer$