🔍 Key Concepts

• Fuel consumption vs. speed (how fuel use typically changes when speed increases) • The relationship between speed and power required (roughly proportional to the cube of speed for many displacement vessels) • Setting up a ratio or proportion using the same units (knots and tons per hour)

💭 Think About

• How does the power (and therefore fuel consumption) change when speed increases from 15 knots to 19 knots? Think about using a ratio like (new speed / old speed) raised to an exponent. • Start by finding the factor by which speed increases. Then apply that factor (to the appropriate power) to the known fuel consumption of 8 tons/hour. • After calculating, compare your result with the answer choices and pick the closest value.

✅ Before You Answer

• Be sure both speeds are in the same units (knots to knots), and fuel in tons per hour for both cases. • Confirm that you apply the speed ratio to the fuel consumption correctly (don’t just scale fuel use linearly with speed). • After computing, double-check that your numerical steps (division, exponent, multiplication) are correct before matching to the nearest multiple-choice option.