Question

an aeroplane at an altitude of 200 m observes the angles of depression of opposite points on the two banks of a river to be 45° and 60°. find the width of the river.?

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Answer 1

Answer:

Let the position of the aeroplane be A, B and C be two points on the two banks of a river such that the angles of depression at B and C are 45° and 60° respectively. Let BD = x m, y m andAD = 200 m. Hence, the width of the river is 315.4 metres.

Answer 2

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