SSC JE Mechanical Engineering 2017 Set 1 Solved Paper

According to the diagram. A and B begin to move from point ‘O’. A reaches 4 m in the north ‘p’, then 3m, in the east ‘Q'. B reaches 9 m in the east ‘R’, then 4 m in the north ‘S’.
According to diagram.
OR ∥ PS or OR = PS
⇒ QS = PS – PQ = OR – PQ = (9 – 3) m = 6 m.
Hence, B is 6 m to the east of A.