Answer:
Step-by-step explanation:
You swim at 3 km/hr with your body perpendicular to a stream with a current of 5 km/hr.
If your actual velocity is the vector sum of the stream's velocity and your swimming velocity, it means that your actual velocity is the resultant velocity. Let R represent the resultant velocity. It means that
R² = 3² + 5² = 9 + 25
R² = 34
Taking square root of the left hand side and the right hand side of the equation, it becomes
R = √34 = 5.83 km/hr.
