Posted by **sara** on Sunday, September 5, 2010 at 4:50am.

a boat goes 16 Km upstream and 24 Km downstream in 6hrs.it can go 12Km upstream and 36 Km in same time.find the speed of boat in still water and speed of the stream

- algebra -
**Andrew**, Sunday, September 5, 2010 at 5:21am
look at the algebraic equation that u posted previously. try to form an equation similar to that.

- algebra -
**drwls**, Sunday, September 5, 2010 at 5:30am
There is something inconsistent with the way this problem is stated. The ratio of upstream to downstream travel time should be independent of how far one travels. The second sentence is unecessary and inconsistent.

Let V be the speed in still water and v be the stream velocity

16/(V-v) = 6

24/(V+v) = 6

16 = 6V - 6v

24 = 6V + 6v

40 = 12V

V = 3.33 km/h

6v = 24 - 20 = 4 km/h

v = 0.67 km/h

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