2. Questions Bank
  3. 8th Class
  4. Mathematics
  5. Direct and Inverse Proportions

8th Class Mathematics Direct and Inverse Proportions Question Bank Direct & Inverse Proportional (Time & Work)

  • question_answer
    X can do \[1/4\] of a work in 10 days. Y Can do 40% of the work in 40 days and Z can do 1/3 of the work in 13 days. Who will complete the work first?

    A)  X                                

    B)  Y              

    C)  Z       

    D)  X and Z both

    Correct Answer: C

    Solution :

    (c): x can do fall work in 40 days \[y\to 4/10\text{ }work\Rightarrow 40\text{ }days.\] \[\therefore y\to full\text{ }work\to 100days\] \[Z\to 1/3\text{ }work\Rightarrow 13\text{ }days\] \[Z\to full\,work\Rightarrow 39\,days.\]      


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