1 / 42 mph = 0.02381 hours per mile
0.02381 hours per mile x 3600 sec. per hour = 85.7143 seconds per mile.
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There are 151200 seconds in 42 hours.
(120 seconds in 2 minutes) + (60 seconds*0.7 = 42) 120 + 42 = 162
6 hours 42 minutes is 24,120 seconds.
18 hours, 37 minutes, 42 seconds =67,062 seconds1,117.7 minutes18.6283 hours
18/42 = 3/7 of an hour and 3/7*60*60 = 1543 seconds