document.write( "Question 734512: Your friend flew to Miami in a plane that averaged 600 mi/h. She drove back home, averaging 50 mi/h. What is her average speed in miles per hour for the whole trip? Assume the distances by plane and car are equal. \n" ); document.write( "
Algebra.Com's Answer #449006 by Alan3354(69443)\"\" \"About 
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Your friend flew to Miami in a plane that averaged 600 mi/h. She drove back home, averaging 50 mi/h. What is her average speed in miles per hour for the whole trip? Assume the distances by plane and car are equal.
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\n" ); document.write( "avg speed = 2*600*50/(600+50)
\n" ); document.write( "=~ 92.3 mi/hr
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