railway RRB JE (CBT I + CBT II) Mock Test 2024 General Science Physics Wave

A sound wave having frequency of 300 Hz is travelling in an unknown medium. Its wavelength is not known. It travels a distance equal to 150 times its wavelength in time t. The value of t is:

1
0.5 s
2
1 s
3
1.5 s
4
2 s
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