A wave is represented by the equation y=...

A wave is represented by the equation `y=7 sin {pi (2t -2x)}` here x is in metres and t in seconds. The velocity of the wave is

A

`1 m//s`

B

`2 m//s`

C

`5 m//s`

D

`10 m//s`

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The correct Answer is:

A

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