A boat travels on the Potomac River between Cumberland, MD, and Washington, DC. When it travels from Cumberland to Washington, it goes with the current. When it travels from Washington to Cumberland, it goes against the current. In still water, the boat’s speed is 8 mph. The travel time ratio of going with the current and going against the current is 1:2. One day, there was heavy rain and the speed of the current doubled. It took 9 hours for the boat to do a round trip. How far apart are the two cities?