document.write( "Question 962389: A boat traveled for 3hr with a 2mph current to reach a picnic area. The return trip against the same current took 6hr. Find the speed of the boat in still water
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Algebra.Com's Answer #587982 by macston(5194)![]() ![]() You can put this solution on YOUR website! . \n" ); document.write( ". \n" ); document.write( "S=speed in still water \n" ); document.write( "3hr(S+2mph)=6hr(S-2mph) \n" ); document.write( "3hrS+6mi=6hrS-12mi Add 12 mi to each side. \n" ); document.write( "3hrS+18mi=6hrS Subtract 3hrS from each side \n" ); document.write( "18mi=3hrS Divide each side by 3 Hr \n" ); document.write( "18mi/3hr=6 mph=S ANSWER: The boats rate in still water was 6 mph. \n" ); document.write( "CHECK: \n" ); document.write( "3hr(S+2mph)=6hr(S-2mph) \n" ); document.write( "3hr(6mph+2mph)=6hr(6mph-2mph) \n" ); document.write( "3hr(8mph)=6hr(4mph) \n" ); document.write( "24mi=24mi \n" ); document.write( " |