document.write( "Question 930542: The speed of a stream is 4 mph. A boat travels 3 miles upstream (against the current) in the same amount of time it takes to travel 11 miles downstream (with the current). Find the speed of the boat in still water (no current).
\n" ); document.write( "ANSWER: The speed of the boat in still water is ______ mph. \n" ); document.write( "
Algebra.Com's Answer #565070 by mananth(16946)\"\" \"About 
You can put this solution on YOUR website!
boat speed x mph with no current
\n" ); document.write( "current speed 4 mph
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\n" ); document.write( "against current x - 4 mph
\n" ); document.write( "with current x + 4 mph
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\n" ); document.write( "Distance against current 3
\n" ); document.write( "Distance with current 11
\n" ); document.write( "Time = same equate the time against with time with current
\n" ); document.write( "t=d/r
\n" ); document.write( "3 /(x- 4 )= 11 /(x+ 4 )
\n" ); document.write( "3 *(x+ 4 )= 11 *(x- 4 )
\n" ); document.write( "3 x + 12 = 11 x -44
\n" ); document.write( "3 x -11 x = -44 + -12
\n" ); document.write( "-8 x = -56
\n" ); document.write( "/ -8
\n" ); document.write( " x= 7 mph
\n" ); document.write( "m.ananth@hotmail.ca
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