document.write( "Question 859010: In testing the rate at which a polluted stream ﬂows, a boat that travels at 5.5 mi/h in still water took 5.0 h to go downstream between to points, and it took 8.0 h to go upstream between the same two points. What is the rate of ﬂow of the stream?
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Algebra.Com's Answer #517481 by lwsshak3(11628) $\"\"$ $\"About$

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In testing the rate at which a polluted stream ﬂows, a boat that travels at 5.5 mi/h in still water took 5.0 h to go downstream between to points, and it took 8.0 h to go upstream between the same two points. What is the rate of ﬂow of the stream?
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\n" ); document.write( "let c=rate of current
\n" ); document.write( "(5.5+c)=rate of boat downstream
\n" ); document.write( "(5.5-c)=rate of boat downstream
\n" ); document.write( "distance=travel time*rate (equal for both upstream and downstream)
\n" ); document.write( "...
\n" ); document.write( "5(5.5+c)=8(5.5-c)
\n" ); document.write( "27.5+5c=44-8c
\n" ); document.write( "13c=16.5
\n" ); document.write( "c≈1.27
\n" ); document.write( " rate of ﬂow of the stream? 1.27 mi/h \n" ); document.write( "

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