document.write( "Question 881482: A car travels 180 km from A to B at 60 kph and returns from B to A along the same route at 90 kph. what is the average speed for the round trip? \n" ); document.write( "
Algebra.Com's Answer #532240 by stanbon(75887)\"\" \"About 
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A car travels 180 km from A to B at 60 kph and returns from B to A along the same route at 90 kph. what is the average speed for the round trip?
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\n" ); document.write( "Average speed = (total distance)/(total time)
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\n" ); document.write( "total distance = 2*180 = 360 km
\n" ); document.write( "total time = 180/60 + 180/90 = 3 + 2 = 5 hrs
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\n" ); document.write( "Average speed = 360 km/ 5 hrs = 72 kph
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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