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

Question

Mathematics

Enrique English

28 February, 20:14

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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Answers (2)

Know the Answer?

Knight · Answer 1

1/7 (3)

Step-by-step explanation:

for e2020 users

Mollie Mueller · Answer 2

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.