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March 28, 2017

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At 9:00 Mary Thorne set out from her house for a picnic, traveling at 15 km/h on her bike. her sister lifet 15 min later and traveled at the speed of 30 km/h. If both her sisters arrived at the picnic area at the same time, how far did each travel?

How would I set this problem up?

  • Anna - ,

    didn't they both travel the same distance?
    let that distance be x km

    so mary's time = x/15
    sister's time = x/30

    The difference is their times is equal to 1/4 hour.

    Translate that into an equation and solve for x

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