document.write( "Question 874894: 11. Alvin paddled for 2 hours with a 6-km/h current to reach a campsite. The return trip against the same current took 8 hours.Find the speed of the boat in still water. \n" ); document.write( "
Algebra.Com's Answer #527832 by mananth(16946)\"\" \"About 
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Boat speed speed x km/h
\n" ); document.write( "current speed 6 km/h
\n" ); document.write( "..
\n" ); document.write( "against current x- 6
\n" ); document.write( "with current x+ 6
\n" ); document.write( "..
\n" ); document.write( "against current 8 hours
\n" ); document.write( "with current 6 hours
\n" ); document.write( "Distance is same. D=r*t
\n" ); document.write( "8 ( x - 6 ) = 6 ( x + 6 )
\n" ); document.write( "8 x - 48 = 6 x + 36
\n" ); document.write( "8 x - 6 x = 48 + 36
\n" ); document.write( "2 x = 84
\n" ); document.write( "/ 2
\n" ); document.write( "x = 42 km/h
\n" ); document.write( "Boat speed speed = 42 km/h
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