Mechanics in waves !!!!!!!

A wire of linear mass density 9.8 X \(10^{-3}\) passes over a frictionless light pulley fixed on the top of a frictionless inclined which makes an angle 60 degree with the vertical. Masses m and M are tied at the two ends of the wire such that m rests on the inclined plane and M hangs freely vertically downwards. The entire system is in equilibrium and a transverse wave propagates along the wire with a velocity of 100 m/s. Then m = x kg. Find x ????

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