Carmen and Susan are members of their school’s running club. The length of the circular track at the school is 1/10 of a mile.


In the time it takes Carmen to run 3 times around the track, Susan runs 4 times around the track.

A. In the time it takes Carmen to run 12 times around the track, how many times could Susan have run around the track? Show your work or explain how you know.

Carmen and Susan both run 1 mile. They start at the same time.

B. When Susan finishes, how many times does Carmen still have to run around the track? Show your work or explain how you know.

2 answers

A.
for Carmen to run 3 times, Susan runs 4 times around the track
for Carmen to run 1 times, Susan runs 4/3 around
for Carmen to run 12 times, Susan runs 12(4/3) or 16 times around the track
(notice that this is a straight ratio thing)
16