The diagram below shows a helicopter hovering at point H 380 m vertically above a lake Point A is the point on the surface of

Question

The diagram below shows a helicopter hovering at point H 380 m vertically above a lake Point A is the point on the surface of the lake directly below the helicopter helicopter 380 H 40 B 25 diagram not to scale Minta Minta is swimming at a constant speed in the direction of point A Minta observes the helicopter from point C as she looks upward at an angle of 25 After 15 minutes Minta is at point B and she observes the same helicopter at an angle of 40 a Write down the size of the angle of depression from H to C

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