A boat goes 15 km upstream and 10 1/2 km down stream in 3 hrs 15 min. It goes 12 km upstream and 14 km downstream in 3 hrs. What is the speed of the boat in still water?
ESPN annually ranks 100 of the most famous active sportspersons in the world to create the 'ESPN World Fame 100' list. Which Indian player had the highest ranking in this list in 2017?