physics
posted by Kelly .
An escalator is 15.0 m long. If a person stands on the escalator, it takes 38.0 s to ride from the bottom to the top.
(a) If a person walks up the moving escalator with a speed of 0.500 m/s relative to the escalator, how long does it take the person to get to the top?
(b) If a person walks down the "up" escalator with the same relative speed as in item (a), how long does it take to reach the bottom?
I have no idea what i am doing!

new speed up=.50m/s+15/38 m/s
time= 15/new speed.
newdownspeed=.515/38 m/s
time= 15/newdownspeed
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