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A map has a scale of 3 cm : 18 km. If Riversaid and Smithville are 54 km apart, then they are how far apart on the map?

how would I set the up as a proportion?

  • math -

    3/18 = x/54

    Cross multiply and solve for x.

  • math -

    x=9?

  • math -

    Right. x = 9 cm

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