A uniform chain of length $$2$$ m is kept on a table such that a length of $$60$$ cm hangs freely from the edge of the table. The total mass of the chain is $$4$$ kg. What is the work done in pulling the entire chain on the table?

A

$$7.2$$ J

B

$$3.6$$ J

C

$$120$$ J

D

$$1200$$ J