1.

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 is 60^(@). When he retreates 20m from the bank, he observes the angle of elevation of the top of the same tree to be 30^(@). Find the height of the tree and the breadth of the river.

Answer»


ANSWER :`10 sqrt3m`, 10M`


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