Airport Engineering
The cruising speed of the aircraft is 500 kmph. If there is a head wind of 50 kmph, then the air speed and ground speed of the aircraft respectively will be

450 kmph and 450 kmph
500 kmph and 500 kmph
450 kmph and 500 kmph
500 kmph and 450 kmph

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Airport Engineering
Castor angle is defined as the angle

Between the direction of wind and the longitudinal axis of the runway
Formed by the longitudinal axis of the aircraft and the direction of movement of the nose gear
Between the horizontal and the fuselage axis
Between the true speed of the aircraft and the crosswind component

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