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Given the following information, what is the Air distance (NAM) covered?

TAS: 120 kt
Headwind component: 20 kt
Ground Distance: 200 NGM

  • A
    240 NAM
  • B
    200 NAM
  • C
    167 NAM
  • D
    220 NAM
A relationship exists between air distance and ground distance, as well as between True airspeed and Ground speed, given by the following equation, which is equal to the Flight time:
  • TIME = NAM / TAS = NGM / GS

Solving for NAM and substituting the known values of the above equation, we get: NAM = NGM x TAS / GS = 200 NGM x 120 kt / (120 - 20) kt = 240 NAM.

OR

The flight time to cover 200 NGM is: Time = NGM / GS= 200 NM / (120 - 20) kt = 2 hr.

So, the Air distance will be: NAM = TAS x Time = 120 kt x 2 hr = 240 NAM.

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