document.write( "Question 836242: Two trains leave the same city at a right angle . The first train travels at a speed of 60 km/hour in one hour. The trains are 100 km apart . How fast is the second train travelling?\r
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Algebra.Com's Answer #504066 by LinnW(1048)\"\" \"About 
You can put this solution on YOUR website!
60^2 + x^2 = 100^2
\n" ); document.write( "3600 + x^2 = 10000
\n" ); document.write( "add -3600 to each side
\n" ); document.write( "x^2 = 6400
\n" ); document.write( "Take square root of each side
\n" ); document.write( "x = 80 miles/hour\r
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