SOLUTION: I need help with this word problem: Rick and Robby left home for a fishing trip at 8:30 a.m. They were traveling at 30 km./hr. Part of the way there, their car broke down. They

Algebra ->  Expressions-with-variables -> SOLUTION: I need help with this word problem: Rick and Robby left home for a fishing trip at 8:30 a.m. They were traveling at 30 km./hr. Part of the way there, their car broke down. They      Log On


   



Question 43600: I need help with this word problem: Rick and Robby left home for a fishing trip at 8:30 a.m. They were traveling at 30 km./hr. Part of the way there, their car broke down. They walked back at a rate of 10 km./hr. and returned home at 10:30 a.m. How far from home were they when the car broke down?
Answer by aaaaaaaa(138) About Me  (Show Source):
You can put this solution on YOUR website!
The time spent to travel x km with the car is x%2F30 hours. The time spent to travel x km on foot is x%2F10 hours. We want to know at what x this equation is true:
x%2F30+%2B+x%2F10+=+2
x%2F30+%2B+3x%2F30+=+60%2F30
x%2Fcross%2830%29+%2B+3x%2Fcross%2830%29+=+60%2Fcross%2830%29
4x+=+60
x+=+15
Therefore, they were 15 km from home when the car broke.