Multiple choice general knowledge history The ratio of width and length of our national flagis ... 3:2 2:3 4:5 5:4 Reveal answer Fill a bubble to check yourself B Correct answer Explanation The Indian national flag has a ratio of 2:3 for width:length. This means if the length is 3 units, the width is 2 units. The flag was adopted in its current form on July 22, 1947.