If the first 100 miles took one hour, then let's say the next 300 miles took x hours.
if 100 miles = 1 hour, then 300 miles =x.
To find the number of hours traveled for the 300 miles, x = 300*1/100
x= <<3=3>>3 hours.
The total number of hours will be 3 +1 = <<3+1=4>>4 hours
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