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    Question

    Supersonic plane fly with the speed

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    A less than the speed of sound Correct Answer Incorrect Answer
    B of sound Correct Answer Incorrect Answer
    C greater than the speed of sound Correct Answer Incorrect Answer
    D of light Correct Answer Incorrect Answer

    Solution

    Supersonic travel is a rate of travel of an object that exceeds the speed of sound (Mach 1). For objects traveling in dry air of a temperature of 20 °C (68 °F) at sea level, this speed is approximately 344 m/s, 1,125 ft/s, 768 mph, 667 knots, or 1,235 km/h.

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