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The angle of elevationof an aeroplane …

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The angle of elevationof an aeroplane from a point on ground is 45degree .after a flight of 15 second the elevation changes to 30 degree .if the aeroplane is flying at a height of 3000 metres ,find the speed of the aeroplane .

    • Posted by Ujjawal Singh Rajput 7 years, 1 month ago

    CBSE > Class 10 > Mathematics
    • 1 answers

    Hiru ? 7 years, 1 month ago

    Using tan45 nd tan30 u can find the distance travelled by plane in 15s........in 15s it travelled 2190m so in 1s it will travell 2190/15=146m..........thus speed of aeroplane is 146m/s

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