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Question
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?
25 years
20 years
30 years
40 years
ANSWER : 2
Descrption
<p>Let, present age of son be 'x'</p> <p> " " " mother be '2x'</p> <p>So, 10 years ago, age of son was 'x - 10'</p> <p> " " " " mother was '2x - 10'</p> <p>ATQ, </p> <p> 2x - 10 = 3(x - 10)</p> <p> = > 3x - 2x = 30 - 10</p> <p> ∴x = 20 <strong>Ans.</strong></p>
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