Question 938311
A boat that goes 12 miles per hour in still water takes as long to go 16 miles upstream as to go 32 miles downstream. Find the velocity of the stream.

can you please give an equation and detailed explanation
<pre><font face = "Tohoma" size = 4 color = "indigo"><b>Let stream’s speed, be S
Then we get: {{{16/(12 - S) = 32/(12 + S)}}}
   32(12 – S) = 16(12 + S) ----- Cross-multiplying
   384 – 32S = 192 + 16S 
– 32S – 16S = 192 – 384 
          – 48S = – 192
S, or stream’s speed = {{{(- 192)/(- 48)}}}, or {{{highlight_green(4)}}} mph      
You can do the check!! 
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