This is a basic question from ML aggarwal book of class 10th, chapter 7, ratio and proportion., ICSE board
In this specific ques we have ratio in the form of a:b and we have to find the duplicate ratio of them
Question no. 3, Chapter 7, ML Aggarwal
Solution:
(i) 2: 3
We know that
Duplicate ratio of 2: 3 = 22: 32 = 4: 9
(ii) √5: 7
We know that
Duplicate ratio of √5: 7 = √52: 72 = 5: 49
(iii) 5a: 6b
We know that
Duplicate ratio of 5a: 6b = (5a)2: (6b)2 = 25a2: 36b2