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At a groundspeed of 120 knots, approximately how long does it take to fly a 60-nautical-mile leg?
Choices
✓ 30 minutescorrect
Time equals distance divided by speed: 60 nm ÷ 120 kt = 0.5 hour = 30 minutes.
60 minutes
That would be correct only at a groundspeed of 60 knots.
15 minutes
15 minutes would cover only 30 nm at 120 knots.
45 minutes
45 minutes at 120 knots covers 90 nm, not 60 nm.
Why
Using distance equals speed times time, the leg time is 60 nm divided by 120 knots, which is 0.5 hour, or 30 minutes.
FAA source: PHAK Ch. 16browse the reference library →
This is taught in Pilotage, Dead Reckoning and Time-Speed-Distance — study the lessons free, then practice with grading and mastery tracking.
Original study question written for this course — representative of FAA knowledge-test topics, not an actual current FAA exam question.