Question 406661: Jeff leaves home on his bicycle and rides out into the country for 3 hours. On his return trip, along the same route, it takes him three-quarters of an hour longer. If his rate on the return trip was 2 miles per hour slower than on the trip out of the country, find the total roundtrip distance.
Answer by ankor@dixie-net.com(22740)   (Show Source):
You can put this solution on YOUR website! Jeff leaves home on his bicycle and rides out into the country for 3 hours.
On his return trip, along the same route, it takes him three-quarters of an hour longer.
If his rate on the return trip was 2 miles per hour slower than on the trip out of the country, find the total round trip distance.
:
Let r = his rate going out
then
(r-2) = his rate returning
:
Convert 3 hr 45 min to 3.75 hrs (45/60=.75)
:
Write dist equation: dist = time * speed
:
return dist = outbound dist
3.75(r-2) = 3r
3.75r - 7.5 = 3r
3.75f - 3r = 7.5
.75r = 7.5/.75
r = 10 mph is his outbound speed
then
8 mph is his return speed (2mph less)
:
Total dist: 3(10) + 3.75(8) =
30 + 30 = 60 miles round trip dist
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