SOLUTION: Mr. Abou leaves Edmonton traveling north at an average speed of 60 km/h. An hour later Mr. Collins leaves on the same route at 100km/h. How many hours after he left, did Mr. Collin

Question 1046861: Mr. Abou leaves Edmonton traveling north at an average speed of 60 km/h. An hour later Mr. Collins leaves on the same route at 100km/h. How many hours after he left, did Mr. Collins overtake Mr. Abou?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
What is Mr Abou's head start in km ?

km
----------------------
Start a stopwatch when Mr Collins leaves
Let = the time on the stopwatch in hrs
when Mr Collins catches up with Mr Abou
Let = distance in km that Mr Collins
travels until he catches up with Mr Abou
----------------------------------------
Mr Collins equation:
(1)
Mr Abou's equation:
(2)
--------------------
Substitute (1) into (2)
(2)
(2)
(2)
In 1 hr 30 min, Mr Collins catches up
with Mr Abou
------------------
check:
(1)
(1)
(1) km
and
(2)
(2)
(2)
(2) km
OK

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