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SSC Sample Paper SSC CHSL (10+2) Sample Test Paper-10

  • question_answer
    A is thrice as good a workman as B and therefore, able to finish a job in 60 days less than B. Work- ing together they will do it in :     

    A) 20 days            

    B) \[22\frac{1}{2}\] days          

    C)         25 days                        

    D) 30 days                   

    Correct Answer: B

    Solution :

    Let A can finish the whole work in \[x\] days. \[\therefore \] B can finish the same work in \[3x\] days. According to question. \[3x-x=60\] \[\therefore x=30\]days \[\therefore \]A can finish the work in 30 days and B can finish the same work in 90 days. \[\therefore \] (A + B)'s one day's work\[=\frac{1}{30}+\frac{1}{90}=\frac{4}{90}\] \[\therefore \] (A + B)'s can finish the complete work in \[=\frac{90}{4}\]\[=22\frac{1}{2}\] days


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