Solution:Concept- LCM: least common multiple of two integers is called LCM.
HCF: The highest common factor of two integers is called HCF.
Given, the sum of LCM and HCF of two numbers is 50,
Their LCM exceeds their HCF by 20.
Put the value of x in equation (1),
Add y's value to the equation (2),
Product of two numbers,
Hence, the correct option is 1.