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The displacement y of a wave travelling ...

The displacement y of a wave travelling in the x direction is given by `y=(2 xx 10^(-3)) sin(300t - 2x + pi/4)`, where x and y are measured in metres and t in second. The speed of the wave is

A

`150 ms^(-1)`

B

`300 ms^(-1)`

C

`450 ms^(-1)`

D

`600 ms^(-1)`

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The correct Answer is:
A
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