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In 10 years, A will be thrice as old as B was 5 years ago. If A is now 9 years older than B, the present age of B is:
  • a)
    19
  • b)
    21
  • c)
    17
  • d)
    15
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
In 10 years, A will be thrice as old as B was 5 years ago. If A is now...
Let B's present age = x years.
Then, A's present age = (x + 9) years.
(x + 9) + 10 = 3(x - 5)
⇒ x + 19 = 3x - 15
⇒ x =17 
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In 10 years, A will be thrice as old as B was 5 years ago. If A is now 9 years older than B, the present age of B is:a)19b)21c)17d)15Correct answer is option 'C'. Can you explain this answer?
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