Question 694497
Total time = 6 hours

L = Time first part of trip
speed I part = 65 mph

Distance I part = 65 L

Time II part = 6 -L
Speed II part = 40 mph


Distance II part = 40(6-L)

Total Distance = 65L + (6-L)*40

=65L+240-40L

=25L+240
Total Distance =25L+240

If L=4

D= 100+240 =340 miles