Question 898288: Bob drove to the mountains last weekend. There was heavy traffic on the way there, and the trip took
8
hours. When Bob drove home, there was no traffic and the trip only took
5
hours. If his average rate was
21
miles per hour faster on the trip home, how far away does Bob live from the mountains?
Do not do any rounding.
Answer by lwsshak3(11628)   (Show Source):
You can put this solution on YOUR website! Bob drove to the mountains last weekend. There was heavy traffic on the way there, and the trip took
8
hours. When Bob drove home, there was no traffic and the trip only took
5
hours. If his average rate was
21
miles per hour faster on the trip home, how far away does Bob live from the mountains?
Do not do any rounding.
***
let x=rate of speed on the way to mountains
x+21=rate of speed on the way home
travel time*rate=distance
8x=5(x+21)
8x=5x+105
3x=105
x=35
8x=280
how far away does Bob live from the mountains? =280 miles
|
|
|
