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Railways R.R.C. (Kolkata) Solved Paper Held on 2nd Shift 9-11-2014

  • question_answer
    If a boy goes to school at 6 km/hr and returns home at 4 km/hr, find his average speed.

    A) 5 km/hr            

    B) 5-2 km/hr

    C) 5-5 km/hr                      

    D) 4-8km/hr

    Correct Answer: D

    Solution :

    Average speed \[=\frac{2\times 6\times 4}{6+4}\] \[=\frac{2\times 6\times 4}{10}=4.8\,\,km/hr\]


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