Lin runs 5 laps around a track in 6 minutes. if lin runs 21 laps at the same rate, how long will it take her?

It will take 25.2 minutes to complete 21 laps.

Explanation:

The rate of covering 5 laps is:

Therefore, the time taken to cover 21 laps is:

Hence, it will take 25.2 minutes or 25 minutes 12 seconds for Lin to complete 21 laps.  

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It will take 25.2 minutes for Lin to run 21 laps.

Explanation:

This question can be solved by a rule of three.

If takes Lin 6 minutes to run 5 laps. So how many minutes it is going to take for her to run 21 laps?

5 laps - 6 minutes

21 laps - x minutes

It will take 25.2 minutes for Lin to run 21 laps.

answer: d. geography : )