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     EduGorilla 
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    A person standing on the bank of a river observes that the angle subtended by a tree on the opposite bank is 60o. When he retires 40m from the bank in the line of the tree, he finds the angle to be 30o. The breadth of the river is

    Options :-

    1. 20 √3 m
    2. 40 m
    3. 60 m
    4. 20 m
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