To calculate time between two VORs, what formula should be used?

The formula to calculate time between two VORs is based on the relationship between distance, speed, and time. When determining how long it will take to travel a certain distance at a specific ground speed, the correct formula is time equals distance divided by ground speed.

In this context, if the distance between the two VORs is known, as well as the aircraft's ground speed, you can simply divide the distance by the ground speed to find the total time it will take to travel that distance. This method aligns with the standard equation in physics where time is a derived quantity calculated from distance and speed.

This approach allows pilots to effectively plan their navigation and ensure they stay within the parameters of their flight path, making it critical for accurate flight operations. Other formulas do not appropriately represent the relationship between these variables for calculating travel time, which is why they are not suitable for this situation.