document.write( "Question 245: Two planes leave O'Hare Airport in Chicago at the same time. One flies directly east at 540 mph. The other flies directly west at 720 mph. How long will it take them to be 1890 miles apart? \n" ); document.write( "
Algebra.Com's Answer #171583 by mooney(1)\"\" \"About 
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1 and half hours \n" ); document.write( "
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