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

  • question_answer
    A can do a work in 9 days, B in 10 days and C In 15 days, B and C together worked for 2 days. If the remaining work is done by A, then how many days does he take?

    A)  10                               

    B)  13

    C)  8                    

    D)         6  

    Correct Answer: D

    Solution :

     Work of \[B\] for \[1\]day \[=\frac{1}{10}\]and work of \[C\] for \[1\] day \[=\frac{1}{15}\] Work of \[(B+C)\] for \[2\] days\[=2\left( \frac{1}{10}+\frac{1}{15} \right)=\frac{1}{3}\] \[\therefore \]Remaining work             \[=1-\frac{1}{3}=\frac{2}{3}\] \[\because \]\[1\] Work is done by \[A\] in \[9\] days \[\therefore \]\[\frac{2}{3}\] work is done by \[A\]             \[=9\times \frac{2}{3}=6\]days


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