Determine the mass (in grams) of a rod of length L cm if it is in equilibrium per the diagram. In the diagram L1, L2, L3 are distance from the left end of the rod, in the order specified (i.e, L3>L2>L1). Assume the center of gravity is at the midpoint of the rod. Find the mass to the nearest gram.
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Thilanka Udara 三生三世 龙 Ashish

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