The product of two positive integers is 1575 and their ratio

The product of two positive integers is 1575 and their ratio is 9 : 7. The smaller integer is

Let the integers be 9x and 7x respectively.
According to the question,
9x × 7x = 1575

⇒ x² =	1575
	63

⇒ x² = 25
⇒ x = 5
[x being positive (+ve) integer]
∴ Smaller integer
= 7x = 7 × 5 = 35