A Loaded Barge Is Being Towed by Two Tugboats, and the Magnitude

Multiple Choice

A loaded barge is being towed by two tugboats, and the magnitude of the resultant is 6,400 pounds directed along the axis of the barge (see figure) .Find the tension in the tow lines if they each make an angle 21° with the axis of the barge.Approximate the answer to one decimal place. ​ ​
Where a = 21°.

A) 3,425.7 lb
B) 3,429.7 lb
C) 3,426.7 lb
D) 3,428.7 lb
E) 3,427.7 lb