Mon February 27, 2012 By:

an aircraft is flying at a constant height with a speed of 360 km/hr.from a point on the ground,the angle of elevation at an instant was observed to be 45degree.after 20 seconds,the angle of elevation was observed to be 30degree.determine the height at which the aircraft is flying.[use root3=1.732]

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Mon February 27, 2012
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