document.write( "Question 522515: Steamer cruises 58 kilometers downstream in the same time that is cruises 40 kilometers upstream. The engines drive the steamer in calm water at a rate which is 20 km/hr more than the rate of the current. Find the rate of the current.\r
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document.write( "How do I set this up? \n" );
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Algebra.Com's Answer #346909 by mananth(16946)![]() ![]() You can put this solution on YOUR website! let current speed = x \n" ); document.write( "steamer speed = x+20\r \n" ); document.write( "\n" ); document.write( "upstream speed = (x+20-x)=20 mph \n" ); document.write( "downstream speed = 2x+20\r \n" ); document.write( "\n" ); document.write( "upstream distance = 40 \n" ); document.write( "downstream distance = 58\r \n" ); document.write( "\n" ); document.write( "times are same\r \n" ); document.write( "\n" ); document.write( "t=d/r\r \n" ); document.write( "\n" ); document.write( "40/20 = 58/(2x+20) \n" ); document.write( "cross multiply \n" ); document.write( "40(2x+20)=58*(20) \n" ); document.write( "80x+800=1160 \n" ); document.write( "80x=1160-800 \n" ); document.write( "80x=360 \n" ); document.write( "x=4.5 mph\r \n" ); document.write( "\n" ); document.write( "m.ananth@hotmail.ca \n" ); document.write( " |