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20 December, 10:20

If Jasper installs a floor himself, it will take him 7 hours. Working with Yolanda, it will take them 3 hours. If they work together, what is the missing value in the table that represents the part of the floor Jasper will install? (3) r 7r 7 (3) Mark this and return

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  1. 20 December, 10:30
    0
    3/7 th part of installation of floor will be done by Jasper when working with Yolanda for 3 hours.

    Step-by-step explanation:

    lets complete installing a floor be represented by W

    Jasper take 7 hours to complete the installing floor W

    so installing done by jasper in 7 hour = W

    so installing done by jasper in 1 hour = W:7 = W/7

    Working with Yolanda, it will take 3 hours to complete work together.

    installation done by jasper in 3 hours = (installing done by jasper in 1 hour) * 3, remaining is done by Yolanda in 3 hours for which we do not need to calculate anything.

    lets concentrate only on installation done by jasper in 3 hours

    = (W/7) * 3 = 3W/7

    so the part of floor installed by jasper = installation done by jasper in 3 hours : total installation = 3W/7:W = 3/7

    Hence 3/7 th of installation of floor will be done by Jasper when working with Yolanda for 3 hours.
  2. 20 December, 10:42
    0
    1/7 (3)

    Step-by-step explanation:

    for e2020 users
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