document.write( "Question 718144: A boat travels at 36 mph downstream. Against the current, the boat travels at 20 mph. How fast is the boat in still water and how fast is the current?
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document.write( "Be sure to tell me how fast each one is. Don't just tell me your answers. \n" );
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Algebra.Com's Answer #440774 by stanbon(75887) ![]() You can put this solution on YOUR website! A boat travels at 36 mph downstream. Against the current, the boat travels at 20 mph. How fast is the boat in still water and how fast is the current? \n" ); document.write( "------ \n" ); document.write( "Equations: \n" ); document.write( "Downstream: b + c = 36 \n" ); document.write( "Upstream:: b - c = 20 \n" ); document.write( "---- \n" ); document.write( "Add and solve for \"b\": \n" ); document.write( "2b = 56 \n" ); document.write( "b = 28 mph (speed of the boat in still water) \n" ); document.write( "---- \n" ); document.write( "Solve for \"c\" using b + c = 36 \n" ); document.write( "28 + c = 36 \n" ); document.write( "c = 8 mph (speed of the current) \n" ); document.write( "=================================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |