Marla starts running around a circular track at the same time Nick starts walking around the same circular track. Marla completes 32 laps around the track per hour and Nick completes 12 laps around the track per hour. How many minutes after Marla and Nick begin moving will Marla have completed 5 more laps around the track than Nick?
Correct answer: D
Explanation
Marla runs 32 laps per hour ==> 0.53 laps per min
Nick runs 12 laps per hour ==> 0.2 laps per min
for every min Marla is taking 0.33 laps advantage
the time when Marla takes 5 laps advantage ==> 5/0.33 = 15.15 ~ 15
Answer D
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