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Q:

The angle of elevation of an aeroplane from a point on the ground is 60°. After flying for 15 second, the angle of elevation changes to 30°. If the Aeroplane is flying at a height of 4500 meter, then what is the speed (in m/s) of aeroplane?

  • 1
    $$ {150\sqrt{3}}$$
  • 2
    $$ {200\sqrt{3}}$$
  • 3
    $$ {100\sqrt{3}}$$
  • 4
    $$ {50\sqrt{3}}$$
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Answer : 2. "$$ {200\sqrt{3}}$$"

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