document.write( "Question 305893: At full speed an airplane can travel 2800 miles with the wind in 4 hours but it requires 7 hours to travel the same distance against the wind. In miles per hour what is the maximum speed of the plane in air? \n" ); document.write( "
Algebra.Com's Answer #218978 by Alan3354(69443)\"\" \"About 
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At full speed an airplane can travel 2800 miles with the wind in 4 hours but it requires 7 hours to travel the same distance against the wind. In miles per hour what is the maximum speed of the plane in air?
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\n" ); document.write( "2800/4 = 700 mph
\n" ); document.write( "2800/7 = 400 mph
\n" ); document.write( "The airspeed is the average = (700+400)/2
\n" ); document.write( "= 550 mph
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