document.write( "Question 166580: fran swims at a speed of 2.2 km/h in still water. the lazy river flows at a speed of 0.4 km/h. how long will it take fran to swim 0.9 km upstream? \n" ); document.write( "
Algebra.Com's Answer #122781 by nerdybill(7384)\"\" \"About 
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fran swims at a speed of 2.2 km/h in still water. the lazy river flows at a speed of 0.4 km/h. how long will it take fran to swim 0.9 km upstream?
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\n" ); document.write( "We will need to apply the \"distance\" formula:
\n" ); document.write( "d = rt
\n" ); document.write( "where
\n" ); document.write( "d is distance
\n" ); document.write( "r is rate or speed
\n" ); document.write( "t is time
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\n" ); document.write( "Reordering the equation, we solve for 't':
\n" ); document.write( "t = d/r
\n" ); document.write( ".
\n" ); document.write( "Fran's rate (r) is:
\n" ); document.write( "2.2 - 0.4 = 1.8 km/h
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\n" ); document.write( "Therefore:
\n" ); document.write( ".9/1.8 = 0.5 hours
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