Kira drove to the mountains last weekend. There was heavy traffic on the way there, and the trip took
10
hours. When Kira drove home, there was no traffic and the trip only took
7
hours. If her average rate was
18
miles per hour faster on the trip home, how far away does Kira live from the mountains?

Question

Kira drove to the mountains last weekend. There was heavy traffic on the way there, and the trip took 
10
 hours. When Kira drove home, there was no traffic and the trip only took 
7
 hours. If her average rate was 
18
 miles per hour faster on the trip home, how far away does Kira live from the mountains?

Vocaloid · Answer

average rate = distance/time

so trip there: r1 = x/10
so trip back r2 = x/7

so r2 is greater than r1 by 18 mph

translate this into an equation and solve for x

Vocaloid · Answer

Closed due to answered.