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NIELIT 2021 Dec Scientist A - Section A: 28

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An aeroplane at an altitude of $3000 \; \text{m}$ observes the angles of depression of opposite points on the two banks of a river to be $45^{\circ}$ and $60^{\circ}$ respectively. Find the width of the river in metre.

  1. $4730$
  2. $4430$
  3. $4150$
  4. $4650$
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