At your current speed of 20 knots you only have enough fuel remaining to travel 360 miles. You must travel 440 miles to reach your destination. What should you reduce your speed (knots) to in order to reach your destination?

Correct Answer: Option B — 18.1

Conserving remaining fuel over an extended distance requires applying the cubic fuel-speed relationship from Bowditch. Setting the proportional distance and consumption constraints against current velocity yields a required speed reduction to 18.1 knots to successfully reach the destination.