An aeroplane at an altitude of 1 km flying horizontally at 800 km/hr passes directly over an observer. Find the rate at which it is approaching the observer when it is 1250 metres away from him.

An aeroplane at an altitude of 1km is flying horizontally at 800 km/hr passes directly over an observer. Find the rate at which it is approaching the observer when it is 1250 meters away from him.

An aeroplane is flying horizontally at an altitude of 3000 ft directly over an observer.If it is flying with a speed of 300 ft /sec,the rate at which it is moving away from the observer when it is at 5000 ft away from the observer is

An aeroplane is flying horizontally at an altitude of 3000 ft directly over an observer.If it is flying with a speed of 300 ft/sec, the rate at which it is moving away from the observe when it is at 5000 ft away from the observer is

An aeroplane is flying horizontally at a height of 2/3k m with a velocity of 15 km/h. Find the rate at which it is receding from a fixed point on the ground which it passed over 2 min ago.

An aeroplane is flying horizontally at a height of 2/3k m with a velocity of 15 km/h. Find the rate at which it is receding from a fixed point on the ground which it passed over 2 min ago.

An aeroplane is flying horizontally at a height of 2/3k m with a velocity of 15 km/h. Find the rate at which it is receding from a fixed point on the ground which it passed over 2 min ago.

An aeroplane is flying horizontally at a height of 2/3k m with a velocity of 15 km/h. Find the rate at which it is receding from a fixed point on the ground which it passed over 2 min ago.

An aeroplane is flying horizontally at a height of (2)/(3)km with a velocity of 15km/h .Find the rate at which it is receding from a fixed point on the ground which it passed over 2 min ago.

A man is walking at the rate of 6.5 km/hr towards the foot of a tower 120m high. At what rate is he approaching the top of the tower when he is 5m away from the tower?