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Railways Sample Paper RRB (Group D) Sample Test Paper-4

  • question_answer
    Walking at the rate of 4 kmph a man covers certain distance in 2hrs 45 min. running at a speed of 16.5 kmph the man will cover the same distance in how many minutes?

    A)  35 min.

    B)  40 min.

    C)  45 min.

    D)  50 min.

    Correct Answer: B

    Solution :

    [b] When distance is contant, then speed is inversely proportional \[{{S}_{1}}:\,{{S}_{2}}={{T}_{2}}:\,{{T}_{1}}\] \[4:\,16.5={{T}_{2}}:165\] \[or\,\,\frac{4}{16.5}=\frac{{{T}_{2}}}{165}\] \[{{T}_{2}}=\frac{165\times 4}{16.5}=40\,\,\min \]


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