A run of 3inch welded pipe contains three pipe segments and

A run of 3-inch welded pipe contains three pipe segments and two butt-welded tees. There’s a short radius elbow at each end of the assembly. The total length of the pipe segments that were used to make the assembly was 11 feet 3 inches. What is the length of the assembly from the center of one elbow to the other?

A. 19 7/8 inches B. 20 7/16 inches C. 20 5/8 inches D. 20 7/8 inches

answer is A