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A machine takes 4.2 hours to make 7 parts. At that rate, how many parts can the machine make in 28.8 hours?

48 parts

41 parts

172 parts

17 parts

4 Answers

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  • Anonymous
    8 years ago
    Favorite Answer

    7/4.2 = x/28.8

    x = (7/4.2)28.8 = 48

  • ?
    Lv 7
    8 years ago

    A machine takes 4.2 hours to make 7 parts.

    At that rate, how many parts can the machine make in 28.8 hours?

    4.2/7 = 28.8/x

    4.2x = 28.8*7

    0.6x = 28.8

    x

    = 28.8/0.6

    = 288/6

    = 48

    Answer choice:

    48 parts

  • 8 years ago

    28.8/4.2 * 7 = 48 parts

  • 8 years ago

    28.8/x = 4.2/7

    4.2x = 201.6

    x = 48

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