Given:
AD = Air distance
GD = Ground distance
TAS = True Airspeed
GS = Groundspeed
Which of the following is the correct formula to calculate ground distance (GD) gone?
GD = (AD X GS)/TAS
GD = (AD - TAS)/TAS
GD = AD X (GS -TAS)/GS
GD = TAS/(GS X AD)