A 343 Hz note is played outdoors on a day when the temperature is 25ºC. What is the wavelength of this note

A. 0.985 m
B. 1.01 m
C. 13.3 m
D. 215 m
E. 1.04 m

I see that "someone" has finally figured out that, for all practical purposes, the speed of sound varies according to temperature ONLY, not barametric pressure, sea level, or the like. Very good!

Ok. At 25ºC, the speed of sound is 346.13 m/s. So, the wavelength of this note is:

(346.13 m/s) / (343 /s) = 1.0091 m. This corresponds to answer B.

B. 1.01 m

Have a good one!
ron