Answer :
Given:
The power output of the source is
[tex]P=3.56\text{ W}[/tex]The surface area is,
[tex]A=\text{ 1.58 m}^2[/tex]Required: intensity of the sound wave
Explanation:
The intensity of the sound wave can be found by the formula.
that is given by,
[tex]I=\frac{P}{A}[/tex]here, P is the power output of the source and A is the surface area.
Plugging all the values in the above formula, we get:
[tex]\begin{gathered} I=\frac{3.56\text{ W}}{1.58\text{ m}^2} \\ I=2.25\text{ w/m}^2 \end{gathered}[/tex]Result: Thus, the intensity of the sound wave is
[tex]2.25\text{ w/m}^2[/tex]and the option 3rd is correct.