Answer:
velocity of the river is equal to 0.56 m/s
Explanation:
given,
velocity of swimmer w.r.t still water = 1 m/s
width of river = 73 m
he arrives to the point = 41 m
[tex]times = \dfrac{distance}{speed}[/tex] Â Â Â
[tex]times = \dfrac{73}{1}[/tex] Â Â Â Â Â
 t = 73 s            Â
[tex]velocity = \dfrac{distance}{time}[/tex] Â Â Â Â Â Â Â Â Â
          = [tex]\dfrac{41}{73}[/tex]           Â
          = 0.56 m/s            Â
velocity of the river is equal to 0.56 m/s