<PRE><B>Question 149269</B>
Car A and car B are traveling in the same direction. Car A is traveling at a constant velocity of 60 mph. and car B is traveling at a constant velocity of 75mph.
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If car A reaches mile marker M 4 minutes after car B, how much time will elapse between the time that car A reaches mile marker M, and the time that the cars are 20 miles apart?
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When car A reaches the M marker, car B will have traveled
{{{4/60}}}* 75 = 5 miles
The relative speed between the two cars: 75 - 60 = 15 mph
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Think of car A being stationary, car B is 5 mi away traveling at 15 mph
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How long would it take Car B to travel another 15 mi at 15 mph?
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They will be 20 mi apart in 1 hr from the time Car A is at the marker

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