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The displacement of a particle in a wave...

The displacement of a particle in a wave is represented by `y=10^-7sinpi[20t-0.1x]`meter, where t is in second and x is in meter. The velocity of this wave is

A

2m/s

B

200m/s

C

20m/s

D

333m/s

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The correct Answer is:
B
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