Two Long Wires (Mass Per Unit Length 1 $\circ$ ,what Is the Length of the Threads from Which the by Threads

Multiple Choice

Two long wires (mass per unit length 1.9 g/m) are suspended by threads attached from the ceiling so that they are parallel to each other and to the ceiling above.They each carry an electric current of 15A,in opposite directions.When they carry no current,the wires hang such that they are touching all along their length,and the threads are vertical and immediately adjacent to one another.If the angle between the threads is 10.0 ^$\circ$ ,what is the length of the threads from which the wires hang?

A) 0.039 m
B) 0.16 m
C) 0.50 m
D) 2.0 m