How fast can Julio paddle his kayak in still water?

Question:

Julio can paddle his kayak 7 miles per hour in still water. How fast is the river's current?

Answer:

The speed of Julio's kayak in still water is 7 miles per hour.

To determine the speed of the river's current, we need to consider the speed at which Julio can paddle in still water. Since we know that Julio can paddle his kayak at a speed of 7 miles per hour in still water, this will serve as a reference point for calculating the speed of the river's current.

Once we have the speed of the kayak in still water, we can compare this to the total speed when Julio is paddling upstream or downstream. By using the relative speed concept, we can calculate the difference between the speed of the kayak and the speed of the river's current to find the current's speed.

Therefore, knowing Julio's speed in still water enables us to derive the river's current speed by analyzing the relative speeds when paddling in different directions.