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The displacement wave in a string is y=(...

The displacement wave in a string is `y=(3 cm)sin6.28(0.5x-50t)` where x is in centimetres and t in seconds. The velocity and wavelength of the wave is :-

A

2 cm, 100 `cms^(-1)`

B

10 cm, 50 `cms^(-1)`

C

20 cm, 2`ms^(-1)`

D

2 m, 100`ms^(-1)`

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A
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