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1. An aeroplane flying horizontally 1 …

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1. An aeroplane flying horizontally 1 km above the ground is observed at an elevation of 60°. After 10 seconds, its elevation is observed to be 30°. Find the speed of the aeroplane in km/hr. 2. Two ships are sailing in the sea on the either side of the light-house, the angles of depression of two ships as observed from the top of the light-house are 60° and 45° respectively. If the distance between the ships is 200 metres, find the height of the light-house. 3. An aeroplane, when 1500 m high passes vertically above another aeroplane at an instance when the angles of elevation of the two aeroplanes from the same point on the ground are 60° and 45° respectively. Find the vertical distance between the two aeroplanes.

    • Posted by Anchør Skull Chalengers 5 years, 1 month ago

    CBSE > Class 10 > Mathematics
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