Answer:
Explanation:
Since it is given that Distance between a boat that is away from a point perpendicular to the shore line = 20 feet
Angle of elevation that is formed between the closest point to the boat and the person = 60°
Now, we need to find the distance between the person and the boat.
Using the trigonometric ratios,
![sin60^{{\circ}}=(AB)/(AC)](https://img.qammunity.org/2020/formulas/mathematics/college/urvzf3xfzn4pz0iew2d8w54xwx0fty93cl.png)
![(√(3))/(2)=(20)/(H)](https://img.qammunity.org/2020/formulas/mathematics/college/jw034tfvj4df0v60tlh07i4vlyucy0m6sj.png)
![(40)/(√(3))=H](https://img.qammunity.org/2020/formulas/mathematics/college/d5x5tfh4ltq1lbz2gwrlxtgqa2ia5g5hy6.png)
![H=(40)/(1.7)](https://img.qammunity.org/2020/formulas/mathematics/college/8w2u30rz71kmjjrpkd1hthv6wviupf043m.png)
![H=23.0 feet](https://img.qammunity.org/2020/formulas/mathematics/college/sjiuj4qkoyn5dfl1meripdy3s2dfgyyolp.png)
Thus, the distance between the person and the boat is 23 feet.