In 25 minute Li can run 10 laps around the track. Determine the number of laps she can run per minute.

Question

write an equation to represent the relationship.

 

Let l be the numb of laps and m be the number of minutes.

 

L=

Answer 1

Think of miles per hour.  If I drive 105 miles in 1 1/2 hours

my speed in miles per hour is found by miles/hours:

105/(1 1/2) = 105/(3/2) = 105(2/3) =70 mph.   It's just division.

 

Laps per minute is simply division  also...  laps/minute

 

Laps per minute = L/m = 10/25 =  2/5 or 0.4 laps per minute