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25 May, 19:03

Hannah can paint a room in 8 hours. Destiny can paint the same room in 10 hours. How long does it take for both

Hannah and Destiny to paint the room it they are working together.

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Answers (2)
  1. 25 May, 19:30
    0
    Step-by-step explanation:

    Let x = time (hours) it takes for both

    then

    x (1/8 + 1/6) = 1

    multiplying both sides by 24 (common denominator):

    x (3 + 4) = 24

    x (7) = 24

    x = 24/7

    x = 3.429 hours

    or

    x = 3 hours and 26 minutes
  2. 25 May, 22:02
    0
    Answer:it will take both of the 4.44 hours.

    Step-by-step explanation:

    Hannah can paint a room in 8 hours. This means that the rate at which she paints the room per hour is 1/8

    Destiny can paint the same room in 10 hours. This means that the rate at which Destiny paints the room per hour is 1/10

    If they work together, they would work simultaneously and their individual rates are additive. This means that their combined working rate would be

    1/8 + 1/10 = 9/40

    Assuming it takes t hours for both of them to paint the room working together, their working rate per hour would be 1/t. Therefore,

    9/40 = 1/t

    t = 40/9 = 4.44 hours
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