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Railways Quantitative Aptitude Average Sample Paper Average & Problems on Ages Sample Test Paper-7

  • question_answer
    A person divides his total route of journey into three equal parts and decides to travel the three parts with speeds of 40, 30 and 15 km/hr respectively. Find his average speed during the whole journey.

    A)  14 km/hr          

    B)  24 km/hr

    C)  34 km/hr          

    D)  44 km/hr

    Correct Answer: B

    Solution :

    [b] By the theorem: Average speed \[=\frac{3\times 40\times 30\times 15}{40\times 30+30\times 15+40\times 15}\] \[=\frac{3\times 40\times 30\times 15}{2250}=24\,\,km/hr\]


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