document.write( "Question 921570: A small plane flies 810 miles from Los Angeles to Portland, Or. with an average speed of 270 mph. An hour and half after the planes leaves, a Boeing 747 leaves Los Angeles for Portland. Both planes arrives in Portland at the same time. What was the average speed of the 747?
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Algebra.Com's Answer #559119 by MathTherapy(10552) $\"\"$ $\"About$

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\n" ); document.write( "\n" ); document.write( "A small plane flies 810 miles from Los Angeles to Portland, Or. with an average speed of 270 mph. An hour and half after the planes leaves, a Boeing 747 leaves Los Angeles for Portland. Both planes arrives in Portland at the same time. What was the average speed of the 747?
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document.write( "Time small airplane traveled for: , or 3 hours
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document.write( "Boeing 747 takes 1.5 hours less, or 3 – 1.5, or 1.5 hours 
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document.write( "Speed of 747: , or  mph \n" );
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