question_answer

Direction: Q. 21 to 25

Nazima is fly fishing in a stream. The tip of her fishing rod is \[\text{1}.\text{8 m}\] above the surface of the water and the fly at the end of the string rests on the water \[3.6\text{ m}\]away and \[2.4\text{ m}\] from a point directly under the tip of the rod. Assuming that her string (from the tip of her rod to the fly) is taut, answer the following questions given below:

How much string does she have out?

A) \[1\,m\]

B) \[1.5\,m\]

C) \[2.5\,m\]

D) \[3\,m\]

Correct Answer: D

Solution :

Length of the string that she has out \[=\sqrt{{{(1.8)}^{2}}+{{(2.4)}^{2}}}\]

(Using Pythagoras theorem)

\[=\sqrt{3.24+5.76}=3m\]

\[\therefore \]  She has 3 m string out.

So, option [d] is correct.