Question

the length and breathe of a rectangular field are in the ratio 5:3and its perimeter is 480m. the width of the room is

Answer 1

Let length be = 5x
then breadth = 3x
Perimeter = 2(l+b)
480 = 2(5x + 3x)
240 = 5x + 3x
240 = 8x
x = 240/8 = 30
Breadth = 3x
= 3 * (30)
= 90m

Answer 2

as l : b ratio is 5 : 3
therefore length = 5x and breadth = 3x
perimeter = 2*(l+b)
480 = 2 * ( 5x + 3x)
480 = 2 * 8x = 16x
so x = 30
therefore length = 150m and breadth = 90m