You have steamed 632 miles at 18.5 knots, and consumed 197 tons of fuel. If you have 278 tons of usable fuel remaining, how far can you steam at 15.0 knots?

Correct Answer: Option A — 1357 miles

Determine the fuel consumption rate per mile at 18.5 knots. Convert this to the rate at 15 knots using the cubic law (F2 = F1 * (V2/V1)^3). Divide the 278 tons of remaining fuel by the 15-knot fuel-per-mile rate to find the total distance the vessel can steam.