Homework Help: Anna

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?

Anna - Reiny, Monday, December 1, 2008 at 8:51pm
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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