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Jessica can build a bookshelf in 4 hours. Sydney can build a bookshelf in 6 hr. How long will it take them if they build the bookshelf together?

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Answers (2)
  1. 7 May, 06:05
    0
    2 hours

    Step-by-step explanation:

    i think
  2. 7 May, 06:28
    0
    About 2.4 Hours

    Step-by-step explanation:

    1/4+1/6=1/h

    12h (1/4+1/6) = 12h (1/h)

    3h+2h=12

    5h=12

    12/5=2.4
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