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.
***
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