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

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) (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
RELATED QUESTIONS
An escalator is moving up from first floor to the 2nd floor. If Marty stands on it, it... (answered by ikleyn)

Howard and Bobby walk up on an escalator which is moving down from the 2nd floor to the... (answered by Edwin McCravy)

an escalator lifts people to the secomd floor, 25ft above the first floor. the escalator... (answered by stanbon)

It takes a child 90 seconds to climb the 60m length of an escalator which is not... (answered by richwmiller)

An escalator lifts people to the second floor of a building, 25 feet above the first... (answered by Alan3354)

it takes a child 90 seconds to climb the 60 m . length of an escalator which is not... (answered by stanbon)

Bob steps onto an escalator which is moving up to the 2nd floor. If he walks one step per (answered by ikleyn)

A 40-foot-long escalator rises from the first floor to the second floor. The escalator... (answered by Gersid)

If it takes you 30 seconds to reach the top of an escalator by just standing on it,and if (answered by ptaylor)