document.write( "Question 1152049: Peggy drives to town at a rate of 40 km/h. How fast must she drive in order to average 80 km/h for the entire trip? \n" ); document.write( "
Algebra.Com's Answer #773964 by Alan3354(69443)\"\" \"About 
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Peggy drives to town at a rate of 40 km/h. How fast must she drive in order to average 80 km/h for the entire trip?
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\n" ); document.write( "If by \"entire trip\" you mean there and back:
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\n" ); document.write( "A round trip at 80 takes the same amount of time as one-way at 40.
\n" ); document.write( "Time is up.
\n" ); document.write( "She cannot average 80 for the round trip.
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\n" ); document.write( "If the \"entire trip\" is not 2 segments of the same length, you'll have to supply more info.\r
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