railway RRB Technician Grade 3 Mock Test 2024 General Science Physics Wave

A train whistle produces a sound with a frequency of 500 Hz. If the wavelength of the sound produced by the whistle is 0.68 meters, what is the speed of sound in air?

1
68 m
2
340 m/s
3
67 m/s
4
70 m/s
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