document.write( "Question 482248: The speed of a stream is 4 mph, if a boat travels 44 miles downstream in the same time that it takes to travel 22 miles, what is the speed of the boat in still water \n" ); document.write( "
Algebra.Com's Answer #330162 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! The speed of a stream is 4 mph, if a boat travels 44 miles downstream in the same time that it takes to travel 22 miles, what is the speed of the boat in still water \n" ); document.write( "---- \n" ); document.write( "Downstream DATA: \n" ); document.write( "dist = 44 miles; rate = b+4 mph ; time = 44/(b+4) hrs. \n" ); document.write( "------------------- \n" ); document.write( "Upstream DATA: \n" ); document.write( "dist = 22 miles; rate = b-4 mph ; time = 22/(b-4) hrs \n" ); document.write( "------------------- \n" ); document.write( "Equation: \n" ); document.write( "time up = time down \n" ); document.write( "44/(b+4) = 22/(b-4) \n" ); document.write( "2/(b+4) = 1/(b-4) \n" ); document.write( "2(b-4) = b+4 \n" ); document.write( "2b-4 = b+4 \n" ); document.write( "b = 8 mph (speed of the boat in still water) \n" ); document.write( "========================== \n" ); document.write( "Cheers, \n" ); document.write( "stan H. \n" ); document.write( "========================== \n" ); document.write( " |