If you cruise at 60 knots for 30 minutes, distance traveled?

• A. 20 NM
• B. 30 NM
• C. 25 NM
• D. 35 NM

Answer: (B)

Distance traveled equals speed times time. At 60 knots you cover 60 nautical miles in one hour. Thirty minutes is half an hour, so time is 0.5 hours. Multiply: 60 × 0.5 = 30 nautical miles. The other values would require different times at the same speed (20 NM would take about 20 minutes, 25 NM about 25 minutes, 35 NM about 35 minutes), so the result for 30 minutes is 30 nautical miles.