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Banking Quantitative Aptitude Sample Paper Quantitative Aptitude Sample Paper-3

  • question_answer
    A motorcycle covers 40 km with a speed of 20 km/h. Find the speed of the motorcycle for the next 40 km journey, so that the average speed of the whole journey will be 30 km/h.

    A)  70 km/h

    B)  60 km/h

    C)  50 km/h

    D)  45 km/h

    E)  40 km/h

    Correct Answer: B

    Solution :

    [b] Let speed of motorcycle for next 40 km journey be \[x\,km/h.\] Then,    \[30=\frac{2\times 20\times x}{20+x}\] \[\Rightarrow \]   \[3\,(20+x)=4x\] \[\Rightarrow \]   \[60+3x=4x\] \[\Rightarrow \]   \[4x-3x=60\] \[\Rightarrow \]   \[x=60\,km/h\]


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