SOLUTION: A car leaves Hartford traveling north at 56 km/h. Another car leaves Hartford one hour later traveling north on the same road at 84 km/h. How far from Hartford will the second car
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Question 967353: A car leaves Hartford traveling north at 56 km/h. Another car leaves Hartford one hour later traveling north on the same road at 84 km/h. How far from Hartford will the second car overtake and pass the first car? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! What is the 1st car's head start? km
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Start a stopwatch when the 2nd car leaves Hartford
Let = distance in km 2nd car travels
until it catches 1st car
Let = time in hrs on stopwatch when 2nd
car catches 1st car
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Equation for 1st car:
(1)
Equation for 2nd car:
(2)
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By substitution: hrs
and
(2)
(2)
168 km from Hartford the 2nd car overtakes the 1st
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check:
(1)
(1)
(1)
OK
