Question

find the duplicate ratio of root over 5 : 7

Answer 1

Duplicate ratio of a : b = a² : b² .

Now, Duplicate ratio of √5 : √7 = (√5)²:(√7)² = 5:7

Hope helped! ^^

Answer 2

Given ratio,
√5 : √7

Duplicate ratio of x : y = x² : y²

So, Duplicate ratio of √5 : √7
= (√5)² : (√7)²
= 5 : 7

Hope it helps