Question

The ratio of the length to the breadth of a rectangle is 5:3.If the perimeter of the rectangle is 144m, what is the length of the rectangle.

Answer 1

let constant be x means ...length 5x and breadth=3x then its side will be 45

Answer 2

Let, the length and breadth of the rectangle is 5x and 3x respectively
Then, perimeter of rectangle=2(l+b)
Now,2(5x+3x)=144
Or, 16x=144
Or,x=144/16
Then,x=9

Then, length=5×9=45