Speed of chain with few vars

I have no idea how to solve this. All i can think of is that you need mass to solve the problem.
1. The problem statement, all variables and given/known data
A chain is lying flat on a table. It has no friction against the flat surface. You pull the chain to the edge of the table so that it from a resting state starts to slide down from the table. The chain is 30 cm long. Calculate the chains velocity when the chain has left the table.

2. Relevant equations
v^2*m*0.5 = Ek


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