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Home Aptitude Linear Equation See What Others Are Saying!
  • Question
  • The age of the father 5 years ago was 5 times the age of his son. At present the father's age is 3 times that of his son . What is the present age of the father?


  • Options
  • A. 33 years
  • B. 30 years
  • C. 45 years
  • D. None of these

  • Correct Answer
  • 30 years 

    Explanation

    Let us assume the present age of father = F year and Son's present age = S years
    According to question, 5 years ago,
    Father's age = F - 5 and Son's age = S - 5.
    According to the question,
    The age of the father 5 years ago was 5 times the age of his son.
    F - 5 = 5(S - 5)
    F - 5 = 5S - 25.....................(1)
    At present the father's age is 3 times that of his son.
    F = 3S.................................(2)
    Put the value of F from equation (2) in equation (1), we will get
    ? 3S - 5 = 5S - 25
    ? 25 - 5 = 5S - 3S
    ? 20 = 2S
    ? 10 = S
    ? S = 10.
    Put the value of S in Equation (2). we will get,
    F = 3S = 3 x 10 = 30
    So the present Age of Father = 30.


  • More questions

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      The value of 47 / 10000 is?

    • Options
    • A. .0047
    • B. .0470
    • C. .00047
    • D. .000047
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    • 2. If 4x = 18y, then the value of ( x/y - 1) is

    • Options
    • A. 1 3
    • B. 7 2
    • C. 2 3
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    • 3. 
      If the price of 23 toys is Rs. 276, then what will the price (Rs.) of 12 toys?

    • Options
    • A. 144
    • B. 158
    • C. 159
    • D. 166
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    • 4. 
      .02 =(......?.....)%

    • Options
    • A. 20
    • B. 2
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    • 5. 
      If 36 men can do a piece of work in 25 hours, in how many hours will 15 men do it?

    • Options
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    • B. 55
    • C. 60
    • D. 72
    • Discuss
    • 6. 
      2?63 / 11 =233

    • Options
    • A. 4
    • B. 3
    • C. 6
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    • Discuss
    • 7. 
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    • Options
    • A. 0
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    • Discuss
    • 8. 
      Aarti can do a piece of work in 6 days. In how many days will she complete three time of work of same type?

    • Options
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    • C. 3 days
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    • Discuss
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    • Options
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    • Discuss
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    • Options
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