Practice SHORT ANSWER
So, the problem you are given to solve here is:
You and a group of friends are going on a kayaking trip on a river. You
will travel 4 miles upstream against the current, take a break for half
an hour, and travel 4 miles downstream with the current. Your group's
average kayaking speed without a current is 2.4 miles per hour.
Your group decides to kayak on a river that has a current with a speed
of 0.8 mile per hour. Based on this information, how many hours will
your trip take, including the half an hour break?