document.write( "Question 919317: A man travels some distance at speed of 12km per hour and return at 9km per hour. if the total time taken by him is 2 hrs 20 min find the distance \n" ); document.write( "
Algebra.Com's Answer #557630 by Alan3354(69443)\"\" \"About 
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A man travels some distance at speed of 12km per hour and return at 9km per hour. if the total time taken by him is 2 hrs 20 min find the distance
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\n" ); document.write( "Avg speed for the round trip is 2*12*9/(12+9)
\n" ); document.write( "Avg = 216/21 = 72/7 km/hr
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\n" ); document.write( "d = r*t
\n" ); document.write( "d = (72/7)*(7/3) = 24 km RT
\n" ); document.write( "12 km each way
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