The equation for the vibration of a string fixed at both ends vibrating in its third harmonic is given by y=2cmsin[(0.6cm−1)x]cos[500πs−1(t)]. The length of the string is -
A
24.6cm
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B
31.4cm
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C
20.6cm
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D
15.6cm
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Solution
The correct option is A15.6cm y=2sin(0.6x)cos(500πt)