Posted by **Algebra 2** on Monday, December 1, 2008 at 8:31pm.

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?

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