document.write( "Question 65062: If a boat goes downstream 72 miles in 3 hours and upstream 60 miles in 6 hours, the rate of the river and the rate of the boat in still water respectively are ? \n" ); document.write( "
Algebra.Com's Answer #45582 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
If a boat goes downstream 72 miles in 3 hours and upstream 60 miles in 6 hours, the rate of the river and the rate of the boat in still water respectively are ?
\n" ); document.write( "--------------------
\n" ); document.write( "Let b be the boat rate; s be the stream rate
\n" ); document.write( "----------------
\n" ); document.write( "Downstream DATA:
\n" ); document.write( "distance=72 miles ; time = 3 hrs ; rate= d/t=72/3=24 mph\r
\n" ); document.write( "\n" ); document.write( "--------------
\n" ); document.write( "Upstream DATA:
\n" ); document.write( "distance = 72 miles ; time = 6 hrs; rate =d/t=72/6 = 12 mph
\n" ); document.write( "---------------
\n" ); document.write( "EQUATIOn:
\n" ); document.write( "b+s=24
\n" ); document.write( "b-s=12
\n" ); document.write( "2b=36
\n" ); document.write( "b=18 mph (boat speed in calm water)
\n" ); document.write( "18+s=24
\n" ); document.write( "s=6 mph (stream speed)
\n" ); document.write( "-----------
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( " \n" ); document.write( "
\n" );