Given data:
*The given wavelength of the wave is
![\lambda=4.5\text{ m}](https://img.qammunity.org/2023/formulas/physics/college/y43ore5queyhzlnyhqtsiftnxlva6rkgdb.png)
*The given time is t = 2 s
The formula for the speed of the wave is given as
![v=(\lambda)/(t)](https://img.qammunity.org/2023/formulas/physics/college/15yffmg2wduali40cqssrwfy89a5uf38jt.png)
Substitute the known values in the above expression as
![\begin{gathered} v=(4.5)/(2) \\ =2.25\text{ m/s} \\ \approx2.3\text{ m/s} \end{gathered}](https://img.qammunity.org/2023/formulas/physics/college/1vi9yhtezeed5fvkshep39phdwiecf63z9.png)
Hence, the speed of the wave is v = 2.3 m/s and the correct option is (4)