A boat takes 2.6 hours to travel 28.43 km down a river, then 5.5 hours to return. How fast is the river flowing?(adsbygoogle = window.adsbygoogle || []).push({});

So we want to find the velocity the river has.

I'm not sure I even started this right.

First I converted 2.6 hours to seconds = 9360 s

Then 5.5 hours to seconds = 19800 s

And 28.43 km to meters = 28430 m

I then used the linear uniform motion equation (xf = xi + vi*t). Am I right in doing this, there is no gravity, correct?

28430 = vi*9360s ---> vi = 3.037 m/s

28430 = vi*19800 ---> vi = 1.436 m/s

This doesn't seem right at all, I don't think I'm understanding the question completely.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Kinematics Problem on river

**Physics Forums | Science Articles, Homework Help, Discussion**