🔍 Key Concepts
• Relationship between speed, time, and distance: Speed=TimeDistance
• How to find fuel consumption per hour (or per mile) from a known run
• Adjusting fuel usage when speed changes but fuel rate is assumed proportional to power/speed for this type of exam problem
💭 Think About
• First, from the initial leg, can you find how many hours the ship steamed using 850 tons of fuel?
• Once you know the total hours and total fuel, can you compute how many tons of fuel per hour were used at 24 knots?
• For the remaining distance at 19 knots, can you find how many hours the run will take, and then use your fuel-per-hour figure to estimate total fuel used?
✅ Before You Answer
• Be sure to convert distance and speed to time correctly: t=SD and keep track of units (hours, miles, knots).
• Double-check that you are using fuel per hour, not fuel per mile, consistently throughout the problem.
• After you get your fuel amount, compare it to 850 tons. At a lower speed for a similar distance, should you expect more or less total fuel than was used on the first leg?