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A wave is represented by the equetion y...

A wave is represented by the equetion
`y=7 sin(7pi t-0.04pix+(pi)/(3))`
x is in metres and t is in seconds. The speed of the wave is

A

`175 m//sec`

B

`49 pi m//sec`

C

` 49 pi m//sec`

D

`0.28 pi m//sec`

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The correct Answer is:
A
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