SOLUTION: Two vehicles are traveling a quarter of a mile. Vehicle a is going 30 mph and vehicle b is going 15 mph. Which vehicle gets there first if vehicle b is given a 20 second head start

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Question 938999: Two vehicles are traveling a quarter of a mile. Vehicle a is going 30 mph and vehicle b is going 15 mph. Which vehicle gets there first if vehicle b is given a 20 second head start? Also what are each vehicles' times?
Answer by josmiceli(19441)   (Show Source): You can put this solution on YOUR website!
Convert sec to minutes
min
Convert minutes to hrs
hrs
---------------------
Find vehicle b's head start in miles

mi
------------------
Start a stopwatch when vehicle a leaves
Let = time in hrs on the stopwatch
when a get to the mi mark
---------------------------------
a's equation:

hrs

sec
-------------------
Start a different stopwatch when vehicle a leaves
Let = time in hrs on the stopwatch
when b gets to the mi mark
b's equation:



hr

sec
---------------------
a arrives at the 1/4 mi mark first, and
beats b by sec

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