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26 August, 02:42

7 years ago, Samir was 3 times as old as Deepak. In 4 years, Samir will be twice as old as Deepak. What is Deepak's present age?

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  1. 26 August, 02:48
    0
    7 years ago:

    Let Deepak be x.

    Deepak = x

    Samir = 3x

    Now (7 years later):

    Deepak = x + 7

    Samir = 3x + 7

    In 4 years time:

    Deepak = x + 7 + 4 = x + 11

    Samir = 3x + 7 + 4 = 3x + 11

    Samir is twice as old as Deepak:

    ⇒ 2 (x + 11) = 3x + 11

    Solve x:

    2 (x + 11) = 3x + 11

    2x + 22 = 3x + 11

    3x - 2x = 22 - 11

    x = 11

    *Remember the x that we define was Deepak's age 7 years ago.

    Find Present Age:

    Deepak = x + 7 = 11 + 7 = 18

    Samir = 3x + 7 = 3 (11) + 7 = 40

    Answer: Deepak is 18 years old.
  2. 26 August, 02:57
    0
    3D+11=2D+22

    D+11=22

    D=11

    D = Deepaks age 7 years ago so

    11+7=18, his age now
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