___ are a mountain range that runs almost parallel to the western coast of the Indian peninsula, and is one of the eight "hottest hotspots" of biological diversity in the world sometimes called the "Great Escarpment of India".
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?