13 2dOn putting A=0 and B=13, we can get 13. On putting D=0 and B=13 in eqn (2), we can still get 13. Thus, we can say that the value of D cannot be determed from the given data.The Long March 2D also known as the Chang Zheng 2D, CZ-2D, and LM-2D, is a Chinese