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How much Time it take for the same Work ?

This is a discussion on How much Time it take for the same Work ? within the CE - Quiz | Puzzles | Mathematics forums, part of the CE : General Discussions category; Sir / madam, My question is Some work is done by two people in 24 minutes. One of them can ...

  1. #1
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    Default How much Time it take for the same Work ?

    Sir / madam,
    My question is

    Some work is done by two people in 24 minutes. One of them can do this work alone in 40 minutes. How much time does the second person take to do the same work ?
    a. 48 Min
    b. 16 Min
    c. 72 Min
    d. 60 Min

    Advance Thanks,
    R.Rengaraj
    {SCE 31/2008/Pg 4 of 85}
    {On this forum my 8th Question.}

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    CE - Regular Member tech_vaibhav_ee's Avatar
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    Default Re: How much Time it take for the same Work ?

    let us give a value to the total amount of work =x
    person a: 40 mins. --> x
    24 mins. --> 24x/40

    person b: y mins. -->x
    24mins -->24x/y

    when working together , they complete the whole work in 24 mins.

    therefore,
    24x/40 +24x/y = x
    y=60 mins..
    hence , person b completes the same work in 60 minutes.
    "Since light travels faster than sound,
    people appear bright until you hear them speak."

  3. #3
    CE - Enthusiast
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    Default Re: How much Time it take for the same Work ?

    Sir,
    Thanks for your answer.
    R.Rengaraj

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