SOLUTION: It takes an escalator 20 seconds to move a person from the first floor to the second.If not operating, Jose takes 30 seconds to walk up on the still escalator. If Jose walks while

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Question 357296: It takes an escalator 20 seconds to move a person from the first floor to the second.If not operating, Jose takes 30 seconds to walk up on the still escalator. If Jose walks while the escalator is moving, how long does it take for him to reach the second floor?
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
speed * time = dist
s=d/t
=d/20 escalator
=d/30 to walk up on the still escalator
.
s=d/20 + d/30
=3d/60 + 2d/60
=5d/60
.
t * 5d/60 = d
t = d * 60/5d
=12 seconds
.
Ed