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The equation for the vibration of a stri...

The equation for the vibration of a string fixed at both ends vibrating in its third harmonic is given by `y=2cm` `sin[(0.6cm^-1)x]cos[(500pis^-1)t]`. The length of the string is

A

24.6cm

B

12.5cm

C

20.6cm

D

15.7cm

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The correct Answer is:
D
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