# Civil Engineering - Airport Engineering - Discussion

### Discussion :: Airport Engineering - Section 1 (Q.No.40)

40.

The air is blowing at a speed of 75 knots in the direction of the aircraft flying at a ground speed of 775 knots. The air speed of the aircraft, is

 [A]. 775 knots [B]. 75 knots [C]. 850 knots [D]. 675 knots

Explanation:

No answer description available for this question.

 Rajesh said: (Sep 5, 2015) How this came?

 Afzal said: (Aug 2, 2016) It should be 700 rather than 675. As Vair = Vground - Vwind = 775 - 75 = 700 knots.

 Chintu said: (Feb 21, 2017) You are right @Afzal.

 Zia Ur Rehman said: (Mar 17, 2017) Yes, right @Afzal.

 Maan Singh said: (Mar 27, 2018) It should be 775-75=700.

 Abdullah Khan said: (Nov 14, 2018) It should be 700.

 Haroon said: (Jan 20, 2020) It is 850knot the air blowing speed is in the same direction so 775+75 = 850knots, If it is in the opposite direction. 775-75 = 700knots.

 Lav Yadav said: (Apr 11, 2020) Right @Haroon. 775+75=850 is the correct answer.

 Vim said: (May 9, 2020) Right, Thanks @Haroon.