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A river has a steady speed of 0.260 m/s. A student swims upstream a distance of...

A river has a steady speed of 0.260 m/s. A student swims upstream a distance of 1.00 km and swims back to the starting point.

(a) If the student can swim at a speed of 1.45 m/s in still water, how long does the trip take?
s

(b) How much time is required in still water for the same length swim?
s

(c) Intuitively, why does the swim take longer when there is a current?

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