document.write( "Question 1050250: A fish boat can travel 60 km with a 2.5-km/hr current in 2 hr less time than it can travel 60 km against the current. Determine the speed of the fishing boat in still water. \n" ); document.write( "
Algebra.Com's Answer #665880 by jorel555(1290)![]() ![]() ![]() You can put this solution on YOUR website! Let r be the rate of the boat in still water. Then: \n" ); document.write( "60/(r+2.5)+2=60/(r-2.5) \n" ); document.write( "60(r-2.5)+2(rē-6.25)=60(r+2.5) \n" ); document.write( "60r-150+2rē-12.5=60r+150 \n" ); document.write( "2rē-312.5=0 \n" ); document.write( "4rē-625=0 \n" ); document.write( "(2r+25)(2r-25)=0 \n" ); document.write( "r=12.5, -12.5 \n" ); document.write( "The rate of the boat in still water is 12.5 km/h. ☺☺☺☺ \n" ); document.write( " |