You are to drive to an interview in another town, at a distance of 270 km on an expressway. the interview is at 11:15
a. m. you plan to drive at around 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 45 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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