Two sources with wavelengths 50 cm and 50.5 cm give 6 beats per second: speed of sound

The same question, asked 2 times: 12 May 2024 S1*, 17 Apr 2026 S2. Every wording below, oldest first.

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Question 1
12 May 2024 S1
24 $Two sounding sources send waves at certain temperature in air of wavelength 50 cm and 50.5 cm respectively. The frequency of sources differ by 6 Hz. The velocity of sound in air at same temperature is$
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Question 2
17 Apr 2026 S2
124 $Two sounding waves send waves at certain temperature in air of wavelength 50 cm and 50.5 cm repectively. The frequency of sources differ by 6 Hz. The velocity of sound in air at same temperature is$
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Question 1