document.write( "Question 1039197: Andy canoed downriver for 2 hours and returned in 3 hours. Andy's sped in still water is 2 mi/hr faster than the sped of the current. If W represents speed in still water and C represents speed of the current, what is Andy's still-water paddling speed and the speed of the current? I have tried to answer it but I keep getting 3.5 mi/hr as paddling speed and 1.5 mi/hr as speed of the current. \n" ); document.write( "
Algebra.Com's Answer #653940 by Boreal(15235) You can put this solution on YOUR website! W=speed in still water mi/hr \n" ); document.write( "C=speed of current \n" ); document.write( "2(W+C)=miles paddled in 2 hours \n" ); document.write( "that equals 3(W-C) coming back. \n" ); document.write( "Distributing, \n" ); document.write( "2W+2C=3W-3C \n" ); document.write( "W=5C \n" ); document.write( "but C=W-2 \n" ); document.write( "distributing again \n" ); document.write( "W=5W-10 \n" ); document.write( "-4W=-10 \n" ); document.write( "W=2.5 mph \n" ); document.write( "C=0.5 mph;W=5C and W=C-2 \n" ); document.write( "3.0 mph together, 2 mph against. \n" ); document.write( "In 2 hours, goes 6 miles downstream \n" ); document.write( "In 3 hours, goes 6 miles upstream \n" ); document.write( " \n" ); document.write( " |