You have steamed 824 miles at 15.5 knots, and consumed 179 tons of fuel. If you have 221 tons of usable fuel remaining, how far can you steam at 18 knots?

Correct Answer: Option B — 754 miles

Derive the fuel burned per mile from initial steaming performance. Using the cubic variance formula for 18 knots with remaining fuel gives a maximum steaming distance of 754 miles.