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Q.

Two sound waves of wavelengths 2 m and 2.02 m produce 15 beats in 3 seconds in a medium. The velocity of sound in that medium is 

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a

 330 m/s

b

1600 m/s

c

1010 m/s

d

 1450 m/s

answer is B.

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Detailed Solution

v2v2.02=153
v[2.0222(2.02)]=5
v[0.022(2.02)]=5
v=5(202) =1010m/s

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