Question

a body of weight w1 is suspended from the ceiling of a room through a chain of weight w2.the ceiling pulls the chain by a force

Answer 1

the ceiling pulls the chain with a force equal to the sum of weights of chain and the body.

So the pulling force = (w1 + w2) 

Answer 2

See diagram for clear understanding of the action forces and reaction forces.

Since the body, chain and ceiling are in equilibrium and at rest, the action and reaction forces are equal. 

See the free body diagrams for the body, chain and ceiling.

The force with which the chain is pulled by ceiling is = W1 + W2.