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9th Class Mathematics Related to Competitive Exam Question Bank Arithmetic

  • question_answer
    If two buses are moving in the opposite directions, their speed having 35 km/hr and 30 km/hr respectively, find their relative speed?

    A)  5 km/hr         

    B)         15 km/hr

    C)  25 km/hr        

    D)         65 km/hr  

    Correct Answer: D

    Solution :

     Here, the two buses are moving in the opposite directions. Their speeds are \[u=35\,\,km/hr\] and                                 \[v=30\,\,km/hr\] \[\therefore \]Relative speed\[=(u+v)km/hr\].                                 \[=(35+30)km/hr\].                                 \[=65\,\,km/hr\]. Hence, the buses have their relative speeds as\[65\,\,km/hr\].


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