To go a distance of 40 km upstream a rower takes 8 hours while it takes her only 5 hours to row the same distance downstream. What was the rower's speed in still water?
Amish Tripathi, a famous Indian writer, is working on a series based on Ramayana, in which the first two books focus on Rama and Sita, respectively. On which character does the third book of this series focus?