Ivan drove to the mountains last weekend. there was heavy traffic on the way there, and the trip took 7 hours. when ivan drove home, there was no traffic and the trip only took 4 hours. if his average rate was 27 miles per hour faster on the trip home, how far away does ivan live from the mountains? do not do any rounding.
During his way to mountain it took 7 hr to drive
and during his return trip it took 4 hr to return
Let x be the distance between home and mountain
average speed for return is 27 miles per hour faster than his former trip
let v be the speed on his way to mountain thus v+27 is his return speed
for return trip
divide 1 & 2