Solution

 Engineering Mechanics (Dynamics)

Chapter 12

Exercise 212

Speed of the boat is then:

$$\begin{align*} v_B &= - \frac{6 \cdot 50}{49.36} \\ v_B &= -6.1 \, \text{ft/s.} \end{align*}$$

Answer

$6.1$ ft/s to the left.