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     EduGorilla 
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    On walking 120 m towards a chimney in a horizontal line through its base, the angle of elevation of the tip of the chimney changes from 30o to 45o. The height of the chimney is

    Options :-

    1. 120 m
    2. 60( – 1) m
    3. 60( + 1) m
    4. None of these
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