Boat A covers a certain distance downstream and upstream in a total of 27 hours. The downstream speeds of boats A and B are 15 km/hr and 10 km/hr resp...
Question
Boat A covers a certain distance downstream and upstream in a total of 27 hours. The downstream speeds of boats A and B are 15 km/hr and 10 km/hr respectively, while their upstream speeds are 12 km/hr and 9 km/hr respectively. What is the total time taken by boat B to cover the same distance downstream and upstream?