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Knots are used to measure speed (for boats, aeroplanes, wind or water/current.) One knot is one sea mile per hour. It is equal to 1.1508 statute miles (1.852 km) per hour or 1.687 ft (0.5144 m) per second. 400 miles per hour = 347.584 knots

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16y ago
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9y ago

A knot is a nautical mile per hour. So this would be 1.48 hours.

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13y ago

400/10 = 40 hours.

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Q: How long does it take to travel 400 nautical miles at 10 knots?
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