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stupidinmath Group Title

working together, 2 service men can clean the pool in 6 hours. If both of them work together in the first 3 hours, and the first one stopped for any reason, it will require the 2nd person 4 hours more. how long will it take them to finish the job alone?

  • 2 years ago
  • 2 years ago

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  1. 03225186213 Group Title
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    @hartnn @nubeer

    • 2 years ago
  2. 03225186213 Group Title
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    one person require 4 hours to claen half pool as two worked for 3hours i.e half of the time for complete pool one will take 8 hours to clean complete pool

    • 2 years ago
  3. nubeer Group Title
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    hmm i am not sure but 8 doesn't look like the answer..

    • 2 years ago
  4. nubeer Group Title
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    ok @03225186213 lets try this way.. it takes 6 hours for 2 people right? and they work for 3 hours means half of the pool will be cleaned?

    • 2 years ago
  5. nubeer Group Title
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    ok no.. i think 8 is right.

    • 2 years ago
  6. Aperogalics Group Title
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    2 men take 6 hr to complete the work then part of work completed in 1hr is 1/6 of work both do work together for 3 hrs then 3*1/6=1/2of work is completed. now 2nd man has to do 1/2 of work so he took 4hrs so to do complete work i.e.2*1/2=1 work is 2*4 hrs =8hrs :)

    • 2 years ago
  7. stupidinmath Group Title
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    thank you, guys! <3

    • 2 years ago
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