Help with a relativity question

[Roscoe1989]

1. ok, my dad and I are trying to solve this problem, but we're both having difficulty:
"When the moving sidewalk at the airport is broken, as it often seems to be, it takes you 50 s to walk from your gate to baggage claim. When it is working and you stand on the moving sidewalk the entire way, it takes 75 s to travel the same distance. How long will it take you to travel from the gate to baggage claim?




3. I think it has something to do with ratios, but he said something about derivatives. Please help!

 

[iRaid]

t=d/(v1+v2)=d/(d/t1 +d/t2)=t1*t2/(t1+t2)

Should help?

 

[lewando]

How long will it take you to travel from the gate to baggage claim?

Still trying to find out what you are asking:

4 scenarios:
Broken -- standing = ∞ s
Broken -- walking = 50 s
Working --standing = 75 s
Working --walking = ? is this what you are trying to find out?

 

[Roscoe1989]

i believe so. the question is asking how long will it take to get to baggage claim if the machine is working and you are walking on in.

 

[lewando]

Are we thinking (like in regular airports) there is a section, d1, of a non-moving floor and a section, d2, of a moving sidewalk?

 

[Roscoe1989]

yes i think so. i copied the question exactly.
iRaid- how did you get from d/(d/t1+d/t2)=t1*t2/t1+t2?