SOLUTION: At 6 AM, Joe set out on a hike from his home and walked at an average speed of 5 kilometers per hour. after walking a certain distance, he noticed that he forgot his lunch box. He

Algebra ->  Length-and-distance -> SOLUTION: At 6 AM, Joe set out on a hike from his home and walked at an average speed of 5 kilometers per hour. after walking a certain distance, he noticed that he forgot his lunch box. He       Log On


   

Question 551668: At 6 AM, Joe set out on a hike from his home and walked at an average speed of 5 kilometers per hour. after walking a certain distance, he noticed that he forgot his lunch box. He rode a jeep and went back home at a speed of 45 kilometers per hour. If he reached his home at 7 AM how far has he walked?
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
let the distance he walked be x
t=d/r
time taken to walk = x/5
he went by jeep.
time taken by jeep = x/45
time to reach home = 1 hour
walking time + jeep time = 1
x/5+x/45 =1
LCD = 45
multiply the equation by 45
9x+x=45
10x=45
/10
x=4.5 km