During a landing, the speed is gradually reduced from its cruising speed as it descends.
Normally, as the planes pass through 10,000 feet, the speed must be reduced to 250 knots.
By 3000 feet, it is down to 200 knots, 1500 feet, 160 knots and by landing, it should be between 110 to 140 knots depending on the type and weight of the airplane.
