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SSC Sample Paper SSC CHSL (10+2) Sample Test Paper-10

  • question_answer
    A boy rides his bicycle 10km at an average speed of 12 km per hr and again travels 12 km at an average speed of 10 km per hr His average speed for the entire trip is approximately:

    A) 10.4 km/hr                    

    B) 10.8 km/hr

    C) 11.0 km/h                     

    D) 12.2 km/hr

    Correct Answer: B

    Solution :

    Total distance \[=10+12=22\]km Total time \[=\frac{10}{12}+\frac{12}{10}\] \[=\frac{244}{120}\] hours \[\therefore \]Required average speed \[=\frac{Total\,\,dis\tan ce}{Total\,\,Time}\] \[=\frac{22}{\frac{244}{120}}=\frac{22}{244}\times 120=10.8\] Km/hr


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