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[" Q.66"|" The angle of elevation of a j...

[" Q.66"|" The angle of elevation of a jet fighter from a point A on the ground is "60^(@)." After "],[" a flight of "15" seconds,the angle of elevation changes to "30^(@)." If the jet is flying at "],[" a speed of "720km/hour," find the constant height at which the jet is flying."]

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The angle of elevation of a fighter from point A on the ground is 60^(@) After a flight of 15 seconds the angle of elevation changes to 30^(@). If the jet is fighting at a speed of 720km/hour . Find the constant height at which the jet is flying.

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