Answer:
It would take 22 seconds to walk from one end of sidewalk to the other.
Step-by-step explanation:
i) distance from the shopping area to the parking garage = 220 feet
ii) normal walking rate = 6 ft / second
iii) moving sidewalk = 4 ft/second
iv) total speed therefore = 6 + 4 = 10 ft/second
v) number of seconds to walk from one end of sidewalk to the other
= 220 ft / (10 ft/second) = 22 seconds.
