A person standing on the bank of a river observes that the angle of elevation of the top of a tree on the opposite bank of the river is 60^{\circ} and when he retires 40 meters away from the tree the angle of elevation becomes 30^{\circ}. The breadth of the river is [AIEEE 2004]

AIEEE 2004 Math Solved Paper

Section: Mathematics

Question : 30 of 68

Marks: +1, -0

A person standing on the bank of a river observes that the angle of elevation of the top of a tree on the opposite bank of the river is 60∘ and when he retires 40 meters away from the tree the angle of elevation becomes 30∘. The breadth of the river is

[AIEEE 2004]

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