document.write( "Question 852107: If down stream is 4kmph and the speed of a boat in upstream is 7kmph,then speed in down stream will be -? \n" ); document.write( "
Algebra.Com's Answer #513148 by checkley79(3341)\"\" \"About 
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SORRY I MISREAD THE PROBLEM. \r
\n" ); document.write( "\n" ); document.write( "boat speed = 7+4 = 11
\n" ); document.write( "downstream:
\n" ); document.write( "11+4=15 kph.\r
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