210. You have steamed 1124 miles at 21 knots, and consumed 326 tons of fuel. If you have 210 tons of usable fuel remaining, how far can you steam at 17 knots?

With 326 tons of fuel consumed steaming 1124 miles at 21 knots, and 210 tons remaining, the remaining distance that can be steamed at 17 knots is 1105 miles, based on the assumption that fuel consumption varies with the cube of speed.