Answer:
10.56 ft/s.
Explanation:
given,
Speed of side walk = 7 ft/s
time taken to travel 74 ft on the moving sidewalk = time taken to walk 15 ft on non moving side walk.
We know,
[tex]time = \dfrac{distance}{speed}[/tex]
[tex]\dfrac{74}{w+7}=\dfrac{15}{w-7}[/tex]
[tex]59 w = 7\times 74 + 15\times 7[/tex]
[tex] 59 w = 623[/tex]
[tex]w = 10.56\ ft/s[/tex]
Rate at which person walk on non moving side walk is equal to 10.56 ft/s.
