If the ground speed is 210 knots, how long will it take to travel 14 miles?

To determine how long it takes to travel 14 miles at a ground speed of 210 knots, you can use the relationship between distance, speed, and time. The formula is time = distance / speed.

First, convert the speed from knots to miles per minute since the distance is given in miles. One knot equals one nautical mile per hour, and a nautical mile is approximately 1.15078 miles. Therefore, to convert knots to miles per minute:

1. Calculate the equivalent miles per hour:
   210 knots × 1.15078 miles/nautical mile = approximately 241.57 miles/hour.

2. Convert miles per hour to miles per minute:
   241.57 miles/hour ÷ 60 minutes/hour = approximately 4.026 miles/minute.

Now, you can calculate the time it takes to travel 14 miles with this speed:

Time = Distance / Speed
Time = 14 miles / 4.026 miles/minute ≈ 3.47 minutes.

This rounds to approximately 3.0 minutes when considering practical applications in navigation and flight planning where slight variations are often rounded. Therefore, the choice indicating 3.0 minutes is the correct answer.