document.write( "Question 499411: It takes a boat 6.5 hours to travel 117miles upstream against the current. If the speed of the current is 5mph, what is the speed of the boat in still water? \n" ); document.write( "
Algebra.Com's Answer #337660 by oberobic(2304) ![]() You can put this solution on YOUR website! The speed of the boat going upstream (against the current) = \n" ); document.write( "s -c : the speed in still water - the speed of the current \n" ); document.write( ". \n" ); document.write( "d = rt is the distance equation \n" ); document.write( "d = 117 (given) \n" ); document.write( ". \n" ); document.write( "t = 6.5 hr (given) \n" ); document.write( ". \n" ); document.write( "c = 5 mph (given) \n" ); document.write( ". \n" ); document.write( "Substitute the knows (givens): \n" ); document.write( ". \n" ); document.write( "117 = (s-5)*6.5 \n" ); document.write( ". \n" ); document.write( "Divide both sides by 6.5 \n" ); document.write( "18 = (s-5) \n" ); document.write( "18 = s -5 \n" ); document.write( ". \n" ); document.write( "Add 5 to both sides \n" ); document.write( "23 = s \n" ); document.write( "s = 23 \n" ); document.write( ". \n" ); document.write( "The speed of the boat in still water is 23. \n" ); document.write( ". \n" ); document.write( "Done. \n" ); document.write( " |