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anonymous

  • one year ago

Steve can paint a room three times as fast as Billy. When they work together, Steve and Billy can paint a large room in 4 hours. How many hours would it take Billy to paint it by himself?

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  1. anonymous
    • one year ago
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    @ash2326 @welshfella @mukushla

  2. anonymous
    • one year ago
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    a. 16/3 b. 3/16 c. 3 d. 16

  3. phi
    • one year ago
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    you need to use rate * time = 1 room rate is rooms/hour say billy works at rate "x" steve is 3 times faster, or 3x

  4. phi
    • one year ago
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    when they work together you can say the combined rate is x+3x and (x+3x)* 4 hours = 1 room 4x*4= 1 16x=1 x = 1/16 that is how fast billy works

  5. anonymous
    • one year ago
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    So 3/16 ?

  6. phi
    • one year ago
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    now use rate * time = 1 with rate = 1/16 to find the time

  7. phi
    • one year ago
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    they asked for How many hours would it take Billy to paint it by himself? (not the rate of steve... rate of steve is 3/16 (three times faster than bill))

  8. anonymous
    • one year ago
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    @phi So it woulf be 16/3

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