PRACTICE PROBLEMS 2. You are to drive to an interview in another town, at a distance of 100
km on an expressway. 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?
nan half the time at 55 km/h and the other half at 90 km/h. On the way back you travel half
N​