The angle of elevation of a jet fighter fromA sphere of diameter 12 cm is dropped in a right circular cylinder , partially filled with water . If the sphere is completely submerged in water the water level rises by 32 / 9 cm .Find the diameter of the cylindrical vessel?a point A on the ground is 60 degree . after a flight of 15 seconds the angle of elevation changes to 30 degree . if the jet is flying at the speed 720 km/h find the constant height at which the jet is flying.