1.

In a medium sound travels 2 km in 3 sec and in air, it travels 3 km in 10 sec. The ratio of the wavelengths of sound in the two media is       [NTSE 1995]

A.   1 : 8      
B.   1 : 18
C.   8 : 1      
D.   20 : 9
Answer» E.


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