A person is swimming against the current in a river. The velocities of person (v) and the current (v') are constant. The swimmer goes from point A to point B over a distance of 800m. At point B, he encounters a log that is heading down river. He continues to swim for a time of 18 minutes until he reaches point C, then turns around and returns to point A where he arrives at the same time as the log.
Calculate velocity (v') of the river's current.
To help you (it didn't help me): d = v * Δt
Please help, if you are a genius, I would be very grateful. |