document.write( "Question 414279: 1. A train, starting at noon, travels north at 40 mph. Another train, starting from the same point at 2pm, travels east at 30 mph. Find to the nearest mile/hr how fast the 2 trains are separating at 3pm.\r
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Algebra.Com's Answer #290555 by mananth(16946)\"\" \"About 
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Train A travels 120 miles in 3 hours
\n" ); document.write( "Train B travels 30 miles in 1 hour
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\n" ); document.write( "they are at right angles. The distance between them is the hypotenuse
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\n" ); document.write( "120^2+30^2= D^2\r
\n" ); document.write( "\n" ); document.write( "14400+900=D^2
\n" ); document.write( "15300 =D^2
\n" ); document.write( "D= 123.7 miles
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