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Given:

True course: 270°.
TAS: 100 kt.
Wind: 090°/25 kt.
Distance: 100 NM.

The ground speed (GS) equals...

  • A

    125 kt.

  • B

    117 kt.

  • C

    120 kt.

  • D

    131 kt.

Refer to figures.
For this question the wind side of your Flight/Navigation computer is required:

  • Set wind direction 270° under the True Index.
  • Mark wind velocity 25 kt up from centre point.
  • Set True Course 090°T under the True Index.
  • Slide wind velocity mark to TAS 100 kt.
  • Ground speed reads under centre: 125 kt.

Distance 100 NM is irrelevant with the question.

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