You are to drive 300 km to an interview. The interview is at 11:15 A.M. You plan

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You are to drive 300 km to an interview. The interview is at 11:15 A.M. You plan to drive at 100 km/h, so you leave at 8: 00 A.M. to allow some extra time. You drive at that speed for the first 100 km, but then construction work forces you to slow to 40 km/h for 40 km. What would be the least speed needed for the rest of the trip to arrive in time for the interview?
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Fundamentals of Physics

ISBN: 978-1118230725

10th Extended edition

Authors: Jearl Walker, Halliday Resnick

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