A child is running on a moving sidewalk in an airport. When she runs against the sidewalk's motion, she travels 42ft in 7 seconds. When she runs with the sidewalk's motion, she travels the same distance in 3 seconds. What is the rate of the child on a still sidewalk and what is the rate of the moving sidewalk?

Question

A child is running on a moving sidewalk in an airport. When she runs against the sidewalk's motion, she travels 42ft  in 7 seconds. When she runs with the sidewalk's motion, she travels the same distance in  3 seconds. What is the rate of the child on a still sidewalk and what is the rate of the moving sidewalk?

anonymous · Answer

this is the last one of this kind lol i promise lol

anonymous · Answer

x --> spped of the chile
y--> speed of sidewalk

anonymous · Answer

similarly 
here we have
3(x+y)=42  or x+y=14
and 7(x-y)=42  or x-y=6
adding the two eq 
2x=20
or x=10 hence putting x in any one of the eq. we have y=4

anonymous · Answer

THANKS!!!! you guys hella helped me with that

johnweldon1993 · Answer

Well, @matricked took those home! lol :)

anonymous · Answer

nothing like that...