Correct option is A
Given:
Two numbers are in the ratio 1 : 3
Product of their HCF and LCM = 1200
Concept Used:
For any two numbers (a, b):
a × b = HCF × LCM
Solution:
Let numbers be k and 3k
So,
k × (3k) = 1200
3k2 =1200
k2 = 400
k = 20
Numbers = k, 3k = 20, 60