document.write( "Question 1042093: Ramesh goes from station A to station B at the speed of 40 km/hr and returns from station B to station A at the speed of 60 km/hr. Find his average speed for the whole journey. \n" ); document.write( "
Algebra.Com's Answer #657004 by stanbon(75887)\"\" \"About 
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Ramesh goes from station A to station B at the speed of 40 km/hr and returns from station B to station A at the speed of 60 km/hr. Find his average speed for the whole journey.
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\n" ); document.write( "Let distance from A to B be \"x\" km
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\n" ); document.write( "Time from A to B = x/40 hr
\n" ); document.write( "Time from B to A = x/60 hr
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\n" ); document.write( "Average speed = (total distance)/(total time)
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\n" ); document.write( "= (2x)/(x/40 + x/60)
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\n" ); document.write( "= (2x)/[(60x + 40x)/40*60]
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\n" ); document.write( "= (2x)/[100x/2400]
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\n" ); document.write( "= 2*2400/100
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\n" ); document.write( "= 48 kmh
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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