A 020-Km Wide River Has a Uniform Flow Speed of 3

Multiple Choice

A 0.20-km wide river has a uniform flow speed of 3.0 m/s toward the east. A boat with a speed of 8.0 m/s relative to the water leaves the south bank and heads in such a way that it crosses to a point directly north of its departure point. How long does it take the boat to cross the river?

A) 29 s
B) 23 s
C) 25 s
D) 27 s
E) 17 s