David can finish painting the room in six hours and his elder brother Anthony can finish it in four hours if both brothers paint the room to

Question

David can finish painting the room in six hours and his elder brother Anthony can finish it in four hours if both brothers paint the room together how many hours will it take them and how many minutes

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Eden 2 weeks 2022-01-08T19:07:01+00:00 1 Answer 0 views 0

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    2022-01-08T19:08:58+00:00

    Answer:

    2.4 hours

    Step-by-step explanation:

    David’s time = 6 hours

    Anthony’s time = 4 hours

    the combined time is given by the following formula

    1/ (david’s time) + 1/(anthony’s time) = 1/total time

    1/6 + 1/4 = 1/Total

    4/24 + 6/24 = 1/Total

    10/24 = 1/ total   (taking reciprocal of both sides)

    24/10 = total

    total time = 24/10 = 2.4 hours

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