document.write( "Question 842484: The speed of a current is 4 mph. If a boat travels 44 miles downstream in the same time that it takes to travel 22 miles upstream, what is the speed of the boat in still water? 15mph, 14mph, 8mph or 12mph? \n" ); document.write( "

Algebra.Com's Answer #507598 by mananth(16949) $\"\"$ $\"About$

You can put this solution on YOUR website!
boat speed x mph
\n" ); document.write( "current speed 4 mph
\n" ); document.write( "
\n" ); document.write( "against current x - 4 mph
\n" ); document.write( "with current x + 4 mph
\n" ); document.write( "
\n" ); document.write( "Distance against current 22
\n" ); document.write( "Distance with current 44
\n" ); document.write( "Time = same equate the time against with time with current
\n" ); document.write( "t=d/r
\n" ); document.write( "22 /(x- 4 )= 44 /(x+ 4 )
\n" ); document.write( "22 *(x+ 4 )= 44 *(x- 4 )
\n" ); document.write( "22 x + 88 = 44 x -176
\n" ); document.write( "22 x -44 x = -176 + -88
\n" ); document.write( "-22 x = -264
\n" ); document.write( "/ -22
\n" ); document.write( " x= 12 mph
\n" ); document.write( "m.ananth@hotmail.ca
\n" ); document.write( "
\n" ); document.write( " \n" ); document.write( "

\n" );