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SSC Sample Paper Mock Test-4 SSC CGL Tear-II Paper-1

  • question_answer
                  A can do a piece of work in 4 h, B and C can do it in 3h. A and C can do it in 2 h. How long will B alone take to do it?

    A)  10 b                            

    B)  12 b

    C)  8 b                              

    D)  24 b

    Correct Answer: B

    Solution :

    A?s 1 h work \[=\frac{1}{4}\](B + C)?s1 h work \[=\frac{1}{3}\] (A + C)?s 1 h work \[=\frac{1}{2}\] \[\therefore \]C?s 1 h work \[=\frac{1}{2}-\frac{1}{4}=\frac{2-1}{4}=\frac{1}{4}\] and B?s 1 h work \[=\frac{1}{3}-\frac{1}{4}=\frac{4-3}{12}=\frac{1}{12}\] and B alone can do the work in 12 h.


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