Question

A person on a moving sidewalk travels 21 feet in 7 seconds. The moving sidewalk has a length of 180 feet. How long will it take to move from one end of the sidewalk to the other?

Answer 1

60 secconds
Explanation;
21 feet /7 secconds =3 secconds per foot.
180/3=60

Answer 2

180/3 60 second

Explanation:

21/7 = 3 feet per second