A sound wave of frequency 245Hz travels with the speed of 300 ms ^...

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1. A$Y ( x, t ) = 0 . 03\left[\sin 5 . 1x - \left(0 . 2 \times {10}^{3}\right)t\right]$
2. B$Y ( x, t ) = 0 . 06\left[\sin 5 . 1x - \left(1 . 5 \times {10}^{3}\right)t\right]$
3. C$Y ( x, t ) = 0 . 06\left[\sin 0 . 8x - \left(0 . 5 \times {10}^{3}\right)t\right]$
4. D$Y ( x, t ) = 0 . 03\left[\sin 5 . 1x - \left(1 . 5 \times {10}^{3}\right)t\right]$