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Q:

From the peak of a hill which is 300m high, the angle of depression of two sides of a bridge lying on a ground are 45° and 30° (both ends of the bridge are on the same side of the hill). Then the length of the bridge is 

  • 1
    300√3 m
  • 2
    $${300\over√3}m $$
  • 3
    300(√3-1) m
  • 4
    300(√3+1) m
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Answer : 3. "300(√3-1) m "

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