Physics

Problem

A boat travels

1.2\,\text{km}

upstream against the current at a constant speed of

3.0\,\text{m/s}

, then immediately turns around and travels

1.8\,\text{km}

downstream with the current at

6.0\,\text{m/s}

. What is the boat’s average velocity for the entire trip? (Take downstream as the positive direction.) a)

4.29\,\text{m/s}

downstream b)

0.86\,\text{m/s}

upstream c)

0.86\,\text{m/s}

downstream d)

1.5\,\text{m/s}

downstream