Question

The length and the breadth are in the ratio 3 : 2. If its perimeter is 30 cm, find its breadth.

Answer 1

Answer:

let ratio constant be x

lenght = 3x

breadth = 2x

perimeter of rectangle = 2(l+b)

30 = 2(3x+2x)

30/2 = 5x

15 = 5x

15/5 = x

3 = x

breadth = 2x

= 2(3)

= 6cm

Answer 2

Answer:

perimeter = 2(length + breadth)

30= 2(3x + 2x)

30,=2(5x)

10x = 30

x= 3