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The equation of a wave travelling on a s...

The equation of a wave travelling on a stretched string is y = 4 sin `2 pi ((t)/(0.02)-(x)/(100))`
Here, x and y are in cm and t is in second. The speed of wave is

A

50 m/s

B

40 m/s

C

50 cm/s

D

40 cm/s

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The correct Answer is:
A
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