A river has a steady speed of 0.562 m/s

Question

. A student swims upstream a distance of
0.839 km and returns to the starting point.
If the student can swim at a speed of
1.06 m/s in still water, how long does the
trip take?
Answer in units of s.

Answer 1

time = time up + time down =
... 839 m {[1 / ((1.06 -.562) m/s)] + [1 / ((1.06 + 5.62) m/s)]}