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c^2 = gh

A seiche is a standing wave in a shallow water basin with antinodes at ends and a node in the center.

A lake is approximately a channel 9 km wide and 300 m deep. Calculate the seiche period for such a channel.

** What i think i can do with this problem is that i can use the height h=300m in the equation but i dont think that will give me the right answer. I am thinking that i should find the area of the channel but i dont know how to use that in the formula to find the speed.

Any ideas?

thank you