document.write( "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? \n" ); document.write( "
Algebra.Com's Answer #269819 by mananth(16946)\"\" \"About 
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cargo truck speed be x km/h
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\n" ); document.write( "\n" ); document.write( "they are travelling one behind the other
\n" ); document.write( "passenger bus catches up = 70-x mph.
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\n" ); document.write( "cargo truck has already traveled 2 hours when the bus starts.
\n" ); document.write( "so it has traveled 2x km.
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\n" ); document.write( "The bus catches up after time t=5
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\n" ); document.write( "t = d/r
\n" ); document.write( "5=2x/(70-x)
\n" ); document.write( "multiply by (70-x)
\n" ); document.write( "5(70-x)=2x
\n" ); document.write( "350-5x=2x
\n" ); document.write( "+5x
\n" ); document.write( "350=2x+5x
\n" ); document.write( "350=7x
\n" ); document.write( "/7
\n" ); document.write( "350/7 = x
\n" ); document.write( "50=x
\n" ); document.write( "..
\n" ); document.write( "the speed of cargo truck = 50 km/hr.
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\n" ); document.write( "m.ananth@hotmail.ca
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