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29 June, 12:01

A group of college students is volunteering for Homes for the Community during their spring break. They are putting the finishing touches on a house they built. Working alone, Wade can paint a certain room in 7 hours. Rhonda can paint the same room in 5 hours. How long will it take them working together to paint the room? Round your answer to the nearest hundredth if necessary.

A. 0.08 hours

B. 17.5 hours

C. 6 hours

D. 2.92 hours

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  1. 29 June, 12:26
    0
    Hours to complete the job:

    Wade = 7

    Rhonda = 5

    Together = t

    Work completed per hour:

    Wade = 1/7

    Rhonda = 1/5

    Together = 1/t

    Adding them together:

    1/7 + 1/5 = 1/t

    12/35 = 1/t

    t = 2.92

    Therefore, it would take them 2.92 hours if they worked together.
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