document.write( "Question 697316: Starting at home, Stephanie traveled uphill to the gift store for 30 minutes at just 10 mph. She then traveled back home along the same path downhill at a speed of 30 mph.\r
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Algebra.Com's Answer #429873 by Alan3354(69443)\"\" \"About 
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Starting at home, Stephanie traveled uphill to the gift store for 30 minutes at just 10 mph. She then traveled back home along the same path downhill at a speed of 30 mph.\r
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\n" ); document.write( "avg = 2*10*30/(10+30)
\n" ); document.write( "= 15 mi/hr regardless of distance
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\n" ); document.write( "The long way:
\n" ); document.write( "30 mins (1/2 hr) at 10 mi/hr --> d = 5 miles
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\n" ); document.write( "5 miles @ 30 mi/hr = 1/6 hour
\n" ); document.write( "Total time = 2/3 hour
\n" ); document.write( "Total distance = 10 miles
\n" ); document.write( "r = 10/(2/3) = 15 mi/hr
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