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A uniform metal chain of mass m and length ‘L’ passes over a massless and frictionless pully. It is released from rest with a part of its length ‘ l ’ is hanging on one side and rest of its length ‘L - l ’ is hanging on the other side of the pully. At a certain point of time, when l = x L , the acceleration of the chain is 2 g . The value of x is ______. L – l l

1. 6
2. 2
3. 1.5
4. 4

Correct answer: 4

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