# A rectangular field has its breadth and length in the ratio 4 : 5.

A rectangular field has its breadth and length in the ratio 4 : 5. If the breadth of the field is 20 m less than the length, then the perimeter of the field in m is

- 240
- 300
- 360
- 540

**Answer: (3) 360 **

**Solution:-**

The ratio of breadth and length of a rectangle = 4: 5

Then, let the breadth and length of the rectangle be 4 X and 5 X.

If the breadth of the field is 20 m less than the length.

Then, 5 X – 4 X = 20

X = 20

So, the breadth and length of the rectangle = 4 x 20 = 80 m and 5 x 20 = 100 m

Then, the perimeter of the rectangle = 2 (80 + 100)

= 2 x 180

= 360 m

Hence, the correct answer is option (3) 360