Displacement of a wave is expressed as \(\mathrm{x}(\mathrm{t})=5\cos \left(628\mathrm{t}+\frac{\pi }{2}\right)\mathrm{m…

Displacement of a wave is expressed as \(\mathrm{x}(\mathrm{t})=5\cos \left(628\mathrm{t}+\frac{\pi }{2}\right)\mathrm{m}\). The wavelength of the wave when its velocity is \(300\mathrm{m}/\mathrm{s}\) is :

[JEE Main 2025, 4 Apr (Shift 2)]