I learned to sail in a 7-foot long sailboat that regularly achieved 20 knots.
That all depends on the type of boat that you are using.
4.7 days at 19.5 knots
It takes a bit over 3 hours to sail 19 miles at 6 knots
It takes (58)/(your speed in knots) hours.
To calculate the time it takes to sail 1 kilometer at a speed of 20 knots, first convert knots to kilometers per hour. Since 1 knot is approximately 1.852 kilometers per hour, 20 knots is about 37.04 kilometers per hour. To find the time, use the formula: time = distance/speed. Thus, it will take about 1.62 minutes to sail 1 kilometer at 20 knots.
The Strait of Gibraltar (36 miles long)
about 7 days in a favorable wind, since the ship would sail at 4-6 knots
This depends on the speed of the vessel over the distance. For instance if assume the vessels speed is 5 knots ( 5 nautical miles an hour) Apply the formula Speed=Distance/Time, With a bit of rearranging Time=Distance/Speed, Therefore it would take 35 hours to sail 175 miles at 5 knots.
The distance is 6665 nautical miles. 27.8 days at sea, speed of 10 knots
Well, a knot is 1 nautical mile per hour.
The Atlantic Ocean.