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You are to drive to an interview in another town, at a distance of 200 km along a straight road from your home.The interview is at 9:15 A.M. You plan to drive at 100 km/h, so you leave home at 7:00 A.M. to allow some extra time. You drive at that speed for the first 20 km, but then you noticed you forgot your wallet, so you drive back home at 120 km/h and get your wallet. In the time remaining, you drive from your home to interview at a constant velocity. Good news: You arrive at the int youterview at exactly 9:15 (yes!).
(a) After you gotyour wallet at home, at what speed did you have to drive? (Ignore the time it took to get out of your car, and get back in the car)
(b) Calculate your average velocity during the entire trip
(c) Calculate your average speed for the entire trip.
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