Given:
The speed of sea otter is
[tex]v_s=5\text{ m/s}[/tex]The speed of the current is
[tex]v_c=\text{ 1 m/s}[/tex]in the opposite direction.
The distance is d = 100 m
To find the time taken by sea otter to cover a distance d = 100 m.
Explanation:
The total speed of sea otter is
[tex]\begin{gathered} v_=v_s-v_c \\ =5-1 \\ =4\text{ m/s} \end{gathered}[/tex]The time taken will be
[tex]\begin{gathered} t=\frac{d}{v} \\ =\frac{100\text{ m}}{4\text{ m/s}} \\ =25\text{ s} \end{gathered}[/tex]Thus, the time taken is 25 s to swim 100 m.
