Tabria rows a boat downstream for 110 miles. The return trip upstream took 12 hours longer. If the current flows at 3 mph, how fast does Tabria row in still water?

two ships leave port at the same time. one ship travels north at 37 mph and the other ship travels east at 44 mph. how fast, in mph, is thedistance between the ships changing after 3 hours? give your answer to the nearest tenth.

A barge leaves St. Louis at 8 am on Friday and travels 180 miles downstream to Cairo. It takes 24 hours to unload and reload and then returns to St. Louis, arriving at 8 am on Thursday. If the barge's speed in still water is 4 miles/hour, how fast is the current of the Mississippi River (in miles/hour) between Cairo and St. Louis?

It took a salmon 45 seconds to swim upstream to a certain spot. The salmon then turned around to swim with the current and arrived at its starting place in 17 seconds. If the current in that part of the stream is 0.43 meters per second, what was the speed of the salmon?