document.write( "Question 118104: A boat travels 1 km upstream and 1km back. The time for the round trip is 10 hours. The speed of the stream is 2 km/hr. What is the speed of the boat in still water? \n" ); document.write( "
Algebra.Com's Answer #86201 by scott8148(6628)![]() ![]() You can put this solution on YOUR website! let x=speed of boat in still water ___ time=distance/rate\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "(1/(x+2))+(1/(x-2))=10 ___ (x-2)+(x+2)=10(x-2)(x+2) ___ 4x=10x^2-40\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "0=5x^2-2x-20 \n" ); document.write( " |