SOLUTION: On a 545 km trip from Detroit to Chicago, Kevin drove partly on the motorway at 120km/h and the rest on roads where he could only average 45km/h. If the total trip took 7h how far

Question 831084: On a 545 km trip from Detroit to Chicago, Kevin drove partly on the motorway at 120km/h and the rest on roads where he could only average 45km/h. If the total trip took 7h how far did Kevin travel on each type of road?
Found 2 solutions by JulietG, Alan3354:
Answer by JulietG(1812) (Show Source): You can put this solution on YOUR website!
I sure hope Kevin was carrying some sort of protection as both those cities are dangerous. (http://content.time.com/time/photogallery/0,29307,1882089,00.html)
.
Are you sure that your numbers are correct? Because, if it's a 540km trip, then it's 3 hours at 120kph and 4 hours at 45kph. (3*120 = 360, 4*45=180, 360+180=540).
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At 545, it ends up a long fraction (3 and change) and just under 4 hours for the 45kph. Please check and repost.
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
It's not that far. It's about 450 km.
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