document.write( "Question 921098: A helicopter traveling at an average speed of 225 km/h left San Jose 1 hour after a train that had departed at 7:00 AM. If the helicopter over took the train in 0.8 hours find the average speed of the train. \n" ); document.write( "
Algebra.Com's Answer #558711 by ankor@dixie-net.com(22740)\"\" \"About 
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A helicopter traveling at an average speed of 225 km/h left San Jose 1 hour after a train that had departed at 7:00 AM.
\n" ); document.write( " If the helicopter over took the train in 0.8 hours find the average speed of the train.
\n" ); document.write( ":
\n" ); document.write( "The helicopter, in .8 hr, traveled the same distance that the train took 1.8 hr
\n" ); document.write( "time varies inversely to the speed
\n" ); document.write( "let t = the train's speed
\n" ); document.write( "\"t%2F225\" = \".8%2F1.8\"
\n" ); document.write( "cross multiply
\n" ); document.write( "1.8t = .8*225
\n" ); document.write( "1.8t = 180
\n" ); document.write( "t = 180/1.8
\n" ); document.write( "t = 100 km/hr is the train
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "Check this by finding the distance of each, should be the same
\n" ); document.write( ".8*225 = 180 km
\n" ); document.write( "1.8*100 = 180 km \n" ); document.write( "
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