Question

    An aeroplane 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 aeroplane (taking √3 = 1.732) is
    A 230.63 m/sec Correct Answer Incorrect Answer
    B 230.93 m/sec Correct Answer Incorrect Answer
    C 235.85 m/sec Correct Answer Incorrect Answer
    D 236.25 m/sec Correct Answer Incorrect Answer

    Solution

    The correct answer is B

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