document.write( "Question 1093796: Jane took \r
\n" ); document.write( "\n" ); document.write( "15 min to drive her boat upstream to​ water-ski at her favorite spot. Coming back later in the​ day, at the same boat​ speed, took her \r
\n" ); document.write( "\n" ); document.write( "5 min. If the current in that part of the river is \r
\n" ); document.write( "\n" ); document.write( "2 km per​ hr, what was her boat speed in still​ water?
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Algebra.Com's Answer #708416 by greenestamps(13200)\"\" \"About 
You can put this solution on YOUR website!

So many different ways to solve the same problem....!

\n" ); document.write( "Here is what I would do.

\n" ); document.write( "The trip took 3 times as long going upstream as downstream. That means her downstream speed must be 3 times her upstream speed.

\n" ); document.write( "If b is the speed of her boat in still water, then her upstream speed is b-2 and her downstream speed is b+2. So

\n" ); document.write( "\"b%2B2+=+3%28b-2%29\"
\n" ); document.write( "\"b%2B2+=+3b-6\"
\n" ); document.write( "\"8+=+2b\"
\n" ); document.write( "\"b+=+4\"
\n" ); document.write( "
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