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Mathematics 7 Online
OpenStudy (anonymous):

A train, starting at 11 am, travels east at 45 mph while another, starting at noon from the same point, travels south at 60 mph. How fast are they separating at 3 pm? I need help solving this related rate. Thanks.

OpenStudy (doggy):

http://openstudy.com/study#/updates/50be91c1e4b09e7e3b85dc28 This page might help, it's an older openstudy question that was answered ^-^

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