SOLUTION: Joelle walks to a store at 4.5MPH. She meets her friend and walks back at 3mph. Total walking time is 1 hour. How long did it take to walk to the store? What is the distance to the

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Joelle walks to a store at 4.5MPH. She meets her friend and walks back at 3mph. Total walking time is 1 hour. How long did it take to walk to the store? What is the distance to the      Log On


   

Question 347029: Joelle walks to a store at 4.5MPH. She meets her friend and walks back at 3mph. Total walking time is 1 hour. How long did it take to walk to the store? What is the distance to the store?
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
let store distance be x mph
speed = 4.5 mh
time taken = x/4.5 hours
..
return from store
time = x/3 hours
..
x/4.5 + x/3 = 1
(3x+4.5x) /4.5*3 =1
7.5x= 4.5*3
7.5x = 13.5
x= 13.5/7.5
x= 1.8 miles
...
distance = 1.8 miles
speed = 4.5 mph
time = 1.8/4.5 hours
time to walk to store = 0.4 hours = 24 minutes