2. Sample Papers
  3. Railways

Railways Sample Paper RRB (Group D) Sample Test Paper-14

  • question_answer
    Two men A and B started a job in which A was thrice as good as B and therefore took 60 days less than B to finish the job. How many days will they take to finish the job, if they start working together?

    A)  15 days           

    B)  20 days

    C)  \[22\frac{1}{2}\]Days   

    D)  25 days

    Correct Answer: C

    Solution :

    [c] If time taken by A be x days, Then time taken by B = 3x days \[\therefore \,\,\,3x-\,x=60\] \[\Rightarrow 2x-\,60\] \[\Rightarrow x=30\] Time taken by B=90 days \[\therefore \](A+B)'s 1 day's work \[=\frac{1}{30}+\frac{1}{90}=\frac{3+1}{90}=\frac{4}{90}=\frac{2}{45}\] \[\therefore \]The work will be completed in \[\frac{45}{2}i.e.\,\,22\frac{1}{2}\,\,days\]


You need to login to perform this action.
You will be redirected in 3 sec spinner