Marla starts running around a circular track at the same time Nick starts walking around the same circular track. Marla completes 10 laps around the track per hour and Nick completes 5 laps around the track per hour. How many minutes after Marla and Nick begin moving will Marla have completed 4 more laps around the track than Nick?
Select the correct option
A) 5	B) 48	C) 12	D) 15	E) 20
Maria's rate - 10 laps per hour --&gt; 10/60 laps/min   Nick's rate - 5 laps per hour --&gt; 5/60 laps/min   lets set equations:   10/60*t=4 (since Maria had to run 4 laps before Nick would start)   5/60*t=0 (Hick has just started and hasn't run any lap yet)   (10/60-5/60)*t=4-0 (since Nick was chasing Maria)   t=48 min needed Maria to run 4 laps   Answer : 48
<result>B</result>
Marla starts running around a circular track at the same time Nick starts walking around the same circular track. Marla completes 10 laps around the track per hour and Nick completes 5 laps around the track per hour. How many minutes after Marla and Nick begin moving will Marla have completed 4 more laps around the track than Nick?