A cargo plane is flying horizontally at an altitude of 11 km with a constant speed of 765 km/hr when a large crate slides out of the rear of the...

A cargo plane is flying horizontally at an altitude of 11 km with a constant speed of 765 km/hr when a large crate slides out of the rear of the plane.How long does it take the crate to hit the ground? The acceleration of gravity is 9.81 m/s2 . how far is the crate from the aircraft when it hits the ground