document.write( "Question 1038571: two trains start simultaneously from p & q which are 400 km apart. the speed of of the train is 5 km/hour is greater than the other .after two hours the distance between the train is 90km find the speed of the train \n" ); document.write( "
Algebra.Com's Answer #653363 by ankor@dixie-net.com(22740)\"\" \"About 
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two trains start simultaneously from p & q which are 400 km apart.
\n" ); document.write( " the speed of of the train is 5 km/hour is greater than the other .
\n" ); document.write( "after two hours the distance between the train is 90km find the speed of the train.
\n" ); document.write( ":
\n" ); document.write( "If the trains are 90 km apart, the sum of the distances the trains have traveled:
\n" ); document.write( "400 - 90 = 310 km
\n" ); document.write( ":
\n" ); document.write( "let s = the speed of the faster train
\n" ); document.write( "then
\n" ); document.write( "(s-5) = the speed of the other train
\n" ); document.write( ":
\n" ); document.write( "Write a distance equation dist = time * speed
\n" ); document.write( "2s + 2(s-5) = 310
\n" ); document.write( "2s + 2s - 10 = 310
\n" ); document.write( "4s = 310 + 10
\n" ); document.write( "4s = 320
\n" ); document.write( "s = 320/4
\n" ); document.write( "s = 80 km/hr is the faster train
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\n" ); document.write( "Confirm this, find actual distances each train traveled in 2 hr
\n" ); document.write( "2(80) = 160 km
\n" ); document.write( "2(75) = 150 km (5 km/hr slower)
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\n" ); document.write( "total dist 310 km \n" ); document.write( "
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