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NTSE Sample Paper NTSE SAT Practice Test-10

  • question_answer
    42 men take 25 days to dig a pond. If the pond would have to be dug in 14 days, then what is the number of men to be employed?

    A) 67                                

    B) 75

    C) 81                                

    D) 84

    Correct Answer: B

    Solution :

    [b] More men (M) less number of days [d] or \[M\propto \frac{1}{D}\] or MD = constant \[\therefore \,\,\,{{M}_{1}}{{D}_{1}}={{M}_{2}}{{D}_{2}}\] or \[42\times 25={{M}_{2}}\times 14\] or \[{{M}_{2}}=75\]


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