A, B, C, D and E are standing in a line facing North. E is standing 40 metres left to B. A is standing 20 metres left to C. D is standing 20 metres right to E and 50 metres right to C. Where is B standing from D?
A post-man starts cycling from his post office. He cycles 7 km South, then turns West and cycles 5 km, Then turns North and cycles 6 km, then turns to his right and cycles 5 km. Where is he now with reference to his post office?