SOLUTION: A passenger bus traveling at the rate of 70km/hr leaves the station 2 hrs. after a cargo truck left and overtakes it in 5 hrs. What is the rate of the cargo truck?
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Question 380160: A passenger bus traveling at the rate of 70km/hr leaves the station 2 hrs. after a cargo truck left and overtakes it in 5 hrs. What is the rate of the cargo truck? Answer by mananth(16946) (Show Source):
You can put this solution on YOUR website! cargo truck speed be x km/h
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they are travelling one behind the other
passenger bus catches up = 70-x mph.
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cargo truck has already traveled 2 hours when the bus starts.
so it has traveled 2x km.
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The bus catches up after time t=5
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t = d/r
5=2x/(70-x)
multiply by (70-x)
5(70-x)=2x
350-5x=2x
+5x
350=2x+5x
350=7x
/7
350/7 = x
50=x
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the speed of cargo truck = 50 km/hr.
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m.ananth@hotmail.ca
