Question

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

Answer 1

21 feet requires = 7 seconds
1 feet requires = 7/21 seconds

180 feet requires
= (7/21)*180
= (1/3)*180
=60 seconds
= 1 minute

Answer 2

Answer:In 5 seconds, an ostrich can run 105 meters

Step-by-step explanation:  The number lines show that seconds of runing to distance can be shown with the ratio 3:63.                                                                                  

we are looking for a ratio that is equivalent 3:63.           First let's find out how many meters an ostrich can run in 1 second by dividing both parts of the ratio by 3