document.write( "Question 403839: A boat travelled 80 km up a river at a speed of x km/hr, what was the time taken for the journey up the river? \n" ); document.write( "
Algebra.Com's Answer #285495 by Alan3354(69443)\"\" \"About 
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d = r*t
\n" ); document.write( "80 = x*t
\n" ); document.write( "t = 80/x hours
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