document.write( "Question 902629: Jake drives a tractor from one town to another, a distance of 130 kilometers. He drives 9 kilometers per hour faster on the return trip, cutting 1 hour off the time. How fast does he drive each way? \n" ); document.write( "

Algebra.Com's Answer #547442 by MathTherapy(10552) $\"\"$ $\"About$

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\n" ); document.write( "Jake drives a tractor from one town to another, a distance of 130 kilometers. He drives 9 kilometers per hour faster on the return trip, cutting 1 hour off the time. How fast does he drive each way?
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document.write( "Let average speed during outbound trip be S
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document.write( "Then average speed during inbound trip is: S + 9
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document.write( "Time equation derived from this: 
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document.write( "130(S + 9) = 130(S) + S(S + 9) -------- Multiplying by LCD, S(S + 9)
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document.write( "(S - 30)(S + 39) = 0
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document.write( "S, or average speed during outbound trip =  km//h
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document.write( "Average speed during inbound trip: 30 + 9, or  km/h
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document.write( "You can do the check!! \r
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