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Railways R.R.C. (Gorakhpur) Solved Paper Held on 2nd Shift 30-11-2014

  • question_answer
    If the frequency of a sound is 800 hertz and its wavelength in a particular medium is 2.5 m, what is the speed of the sound in the medium?

    A) 2000 m/s          

    B) 800 m/s

    C) 320 m/s

    D) Speed cannot be calculated from frequency and wavelength

    Correct Answer: A

    Solution :

    n = 800 Hertz             \[\lambda =2.5\,\,m\]             v=9 Formula, \[v=n\lambda \] \[=800\times 2.5\,\,m/s\] \[=2000\,\,m/s\]


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