The present age of son is half of the present age of his mother. Ten years ago, his mother's age was thrice the age of her son . What is the present age of the son?

A 25 years
B 20 years
C 30 years
D 40 years

Correct Answer: 20 years

Let, present age of son be 'x' " " " mother be '2x' So, 10 years ago, age of son was 'x - 10' " " " " mother was '2x - 10' ATQ, 2x - 10 = 3(x - 10) = > 3x - 2x = 30 - 10 ∴x = 20 Ans.
Bissoy MCQ
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