if you traveled at 60mph and wanted to go to a place 290mi away, it would take 4.83 hours
(about 4 hours and 50 minutes)
but, if you traveled at 70mph and wanted to go to a place 290 miles away, it would take 4.14 hours
(about 4 hours and 8 minutes)
so, it would take about 42 minutes longer to travel at 60mph