A person on a moving sidewalk travels 20 feet in 5 seconds. the moving sidewalk has a length of 80 feet. how long will it take t o move from one end to the other?
1 answer:
It will take 20 seconds to move from one end to another because if 20 feet is moved within 5 seconds, do that 4 more times to get to 80. Finally, multiply 5 by 4 to get 20 seconds.
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