Rahul travels 8km towards east, turns right and travels another 6km, and then takes two successive left turns covering 21km and 6km in each turn respectively. Finally, he takes a right turn and travels 8km further. How far is he now from his original position?
The weights of 4 boxes are 100, 90, 80 and 40 kilograms. Which of the following cannot be the total weight, in kilograms, of any combination of these boxes and in a combination a box can be used only once?