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A standing wave is represented by, y-Asi...

A standing wave is represented by, `y-Asin(100t)cos(0.01x)`, where x,y and A are in millimeter and t in second. The velocity of the wave is

A

`10^(4)m//s`

B

10m/s

C

`10^(-4)m//s`

D

`10^(3)m//s`

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The correct Answer is:
B
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