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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

Not derivable

C

1 m/s

D

`10^(2)` m/s

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The correct Answer is:
A
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