In order to gain the advantage of a bit of free airspeed and so reduce the amount of fuel the engines have to burn to accelerate the plane from zero GROUNDspeed to take-off AIRspeed.
They also land into the wind as well so that the touchdown GROUNDspeed can be a bit lower while still having enough AIRspeed to keep the aircraft aloft. This reduces wear on expensive tyres and brakes, as well as reducing the fuel used in reverse thrust.
They also land into the wind as well so that the touchdown GROUNDspeed can be a bit lower while still having enough AIRspeed to keep the aircraft aloft. This reduces wear on expensive tyres and brakes, as well as reducing the fuel used in reverse thrust.