SOLUTION: An escalator in a department store moves down at the rate of sixty-four steps per minute. Wendy can walk up ordianry steps at the rate of ninety-six steps per minute. In the stor

Algebra ->  Customizable Word Problem Solvers  -> Misc -> SOLUTION: An escalator in a department store moves down at the rate of sixty-four steps per minute. Wendy can walk up ordianry steps at the rate of ninety-six steps per minute. In the stor      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 106414: An escalator in a department store moves down at the rate of sixty-four steps per minute. Wendy can walk up ordianry steps at the rate of ninety-six steps per minute. In the store, forty-eight steps go from on level to another. Wendy walks up the down escalator. How long will it take her to go up one level?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
An escalator in a department store moves down at the rate of sixty-four steps per minute. Wendy can walk up ordinary steps at the rate of ninety-six steps per minute. In the store, forty-eight steps go from one level to another. Wendy walks up the down escalator. How long will it take her to go up one level?
:
48 steps is the distance from one floor to the other.
:
Wendy's speed walking up: 96 steps/min
:
Escalator speed going down: 64 steps/min
:
Let t = time required to travel the 48 steps to the next floor
:
Dist = speed * time
:
Wendy's dist - escalator dist = 48 steps
96t - 64t = 48
32t = 48
t = 48/32
t = 1.5 min
: