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In a medium sound travels 2 km in 3 sec ...

In a medium sound travels 2 km in 3 sec and in air, it travel 3 km in 10 sec . The ratio of the wavelengths of sound in the two media is

A

`1:8`

B

`1:18`

C

`8:1`

D

`20:9`

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The correct Answer is:
D
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