Use a stopwatch or a timer to time yourself walking for one minute. Start walking at your normal pace as soon as you start the stopwatch or timer. Count your steps as you walk. After one minute, stop walking and record the number of steps you walked. What is the ratio of the number of steps to the number of minutes?

At a constant it will take one hour to travel 32 mi.at that speed it will take 1/2 hr to travel the remaining 16 mi.it will take 1+1/2 hr to travel the 48mi @ 32mph.so 1 hr = 60 min& 1/2 hr = 30 min1+1/2 hr = 90 min.there are 60s in each 90 × 60 = 3600 seconds.the real question seriously is he why are they driving so slow? ! lol.

Ithink it's the first one ( let me know if it right)