Posted by **natali** on Saturday, January 19, 2013 at 4:01pm.

Lauren is pedaling down a steep hill on her bicycle and wants to be able to coast up the next hill, which is 25 meters high, without pedaling up the hill at all. What would her speed at the bottom need to be?

50 m/s

71 m/s

7.1 m/s

240 m/s

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