A 2.2 m-long string is fixed at both ends and tightened until the wave speed is 50 m/s. What is the frequency of the standing wave shown in the figure?

Question

A 2.2 m-long string is fixed at both ends and tightened until the wave speed is 50 m/s. What is the frequency of the standing wave shown in the figure? 
Answer in Hz.
I've been working on it for a while but cant figure out...

drwls · Answer

Without the figure, or a description of it, we can't help you. Use the figure to determine the wavelength. It will be twice the distance between two nodes (zeroes) of the standing wave pattern. Then use
(frequency) * (wavelength) = (wave speed) to get the frequency.

AP · Answer

there are 6 nodes in the diagram