Prasad moves towards North a distance of 10 km after which, he turns towards East and travels 20 km at which point, he turns South and continues for another 10 km. Finally, he moves 7 km West. How far is he from the starting point?
An army recruit is training. He starts and runs 2 km East, then 3 km South, then 5.5 km West, then 4 km North, then 3.5 km East, where is he now with reference to the starting position?