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Q:

An Aeroplan flying horizontally at a height of 3 km. Above the ground is observed at a certain point on earth to subtend an angle of 60 °. After 15 sec flight, its angle of elevation is changed to 30 °. The speed of the Aeroplan (taking √3 = 1.732) 

  • 1
    235.93 m/sec.
  • 2
    236.25 m/sec.
  • 3
    230.63 m/sec.
  • 4
    230.93 m/sec.
  • Show Answer
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Answer : 4. "230.93 m/sec. "

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