please help me with this problem, thanks.

[hbng02]

A person hums into the top of a well and finds that standing waves are established at frequency of 42,000, and 98 Hz. The frequency of 42 Hz. is not necessarily the fundamental frequency. The speed of sound is 343 m/s. How deep is the well?

[cookiemonster]

Originally posted by hbng02
... finds that stadning waves are established at frequency of 42,000, and 98 Hz.

What exactly do you mean by this?

cookiemonster