document.write( "Question 602789: A racing team can paddle their canoe 11 miles downstream in the same time it takes to paddle 3 miles upstream in a 2 mile per hour current. How fast can they paddle in still water? \n" ); document.write( "
Algebra.Com's Answer #380454 by flame8855(424)![]() ![]() You can put this solution on YOUR website! let x be the normal speed \n" ); document.write( "c is the speed of the current \n" ); document.write( "speed downstream : x+c \n" ); document.write( "speed upstream : x-c \n" ); document.write( "speed = distance/time \n" ); document.write( "c = 2 mph \n" ); document.write( "speed downstream = distance /time = x+2 = 11/t \n" ); document.write( "t= 11/(x+2) \n" ); document.write( "speed upstream = x-2 = 3/t \n" ); document.write( "t= 3/(x-2) \n" ); document.write( "t=t \n" ); document.write( "so x = 7/2 = 3.5 mph in still water\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |