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The Interstate On-Ramp Is 5

question 32

Multiple Choice

The interstate on-ramp is 5.5 km west of your home, and on leaving for grandmother's house you are only able to accomplish an average velocity of 38 km/hr between your home and the on-ramp. At the on-ramp, you wait for traffic for 2.0 min before proceeding toward grandmother's house. If you wish to arrive there, which is 15 km south of the on-ramp, over a river and through some woods, having achieved an average velocity of 42 km/hr for the whole trip, how fast do you need to drive south on the interstate highway?

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