A Uniform,horizontal Beam of Length 6

Multiple Choice

A uniform,horizontal beam of length 6.0 m and weight 140 N is attached at one end to a wall by a pin connection (so that it may rotate) .A cable attached to the wall above the pin supports the opposite end.The cable makes an angle of 60° with the horizontal.What is the tension in the cable needed to maintain the beam in equilibrium?

A) 81 N
B) 69 N
C) 70 N
D) 140 N