SOLUTION: Sharon and Ken drove to the service station at 60 km per hour. They returned home by bicycle at 15 km per hour. The entire trip took 4 hours. How far was the round trip?

Algebra ->  Expressions-with-variables -> SOLUTION: Sharon and Ken drove to the service station at 60 km per hour. They returned home by bicycle at 15 km per hour. The entire trip took 4 hours. How far was the round trip?      Log On


   



Question 128406: Sharon and Ken drove to the service station at 60 km per hour. They returned home by bicycle at 15 km per hour. The entire trip took 4 hours. How far was the round trip?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Both trips were the same distance
Call the distance to the service station dkm
d+=+r%2At and
d%2Fr+=+t
d%2F60+%2B+d%2F15+=+4
multiply both sides by 60
d+%2B+4d+=+4%2A60
5d+=+240
d+=+48km
The round trip = 2d
The round trip was 96 km answer