A bike travels 7 feet in 1/3 of a second. At the same speed, how many feet will it travel in 5 seconds?

Question

A bike travels 7 feet in 1/3 of a second. At the same speed, how many feet will it travel in 5 seconds?

Answer 1

Set up a proportion:

 

   7 feet                x feet

---------------- = ---------------

1/3 second        5 seconds

 

Solve for x.

 

--------------

Another way to do it is to compute the "unit rate":

 

 7 feet

-----------  =  7 * 3/1 = 21 feet per second

1/3 sec.

 

The distance traveled in 5 seconds is (5 seconds) * (21 feet/second) = ____________