document.write( "Question 898374: I paddle 8 miles down a river. In two hours the return trip takes me 4 hours. What is the speed of the current? \n" ); document.write( "
Algebra.Com's Answer #544801 by mananth(16946)\"\" \"About 
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distance = 8\r
\n" ); document.write( "\n" ); document.write( "let speed of boat be x
\n" ); document.write( "speed of current be y\r
\n" ); document.write( "\n" ); document.write( "down stream speed = x+y
\n" ); document.write( "upstream speed = x-y\r
\n" ); document.write( "\n" ); document.write( "time down stream = 2
\n" ); document.write( "time upstream = 4\r
\n" ); document.write( "\n" ); document.write( "t=d/r\r
\n" ); document.write( "\n" ); document.write( "8/(x+y )= 2
\n" ); document.write( "x-y=4...............(1)\r
\n" ); document.write( "\n" ); document.write( "8/(x-y)= 4
\n" ); document.write( "x-y =2..............(2)\r
\n" ); document.write( "\n" ); document.write( "solve (1) & (2)\r
\n" ); document.write( "\n" ); document.write( "2x=6
\n" ); document.write( "x=3
\n" ); document.write( "y=1\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
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