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Home Aptitude Time and Work Comments

  • Question
  • Amar can do a piece of work in 10 days. He works at it for 4 days and then Arun finishes it in 9 days. In how many days can Amar and Arun together finish the work ?


  • Options
  • A. 4 days
  • B. 8 days
  • C. 3 days
  • D. 6 days

  • Correct Answer
  • 6 days 

    Explanation

    4/10 + 9/x = 1     => x = 15 

     

    Then both can do in 

    1/10 + 1/15 = 1/6     => 6 days

  • Tags: GRE, GATE, CAT, Bank Exams, AIEEE, Bank PO, Bank Clerk

    Time and Work problems


    Search Results


    • 1. Five men and nine women can do a piece of work in 10 days. Six men and twelve women can do the same work in 8 days. In how many days can three men and three women do the work ?

    • Options
    • A. 18 days
    • B. 20 days
    • C. 16 days
    • D. 14 days
    • Discuss
    • 2. K can build a wall in 30 days. L can demolish that wall in 60 days. If K and L work on alternate days, when will the wall be completed ?

    • Options
    • A. 120 days
    • B. 119 days
    • C. 118 days
    • D. 117 days
    • Discuss
    • 3. One girl can eat 112 chocolates in half a minute, and her boy friend can eat half as many in twice the length of time. How many chocolates can both boy and girl eat in 12 seconds ?

    • Options
    • A. 44
    • B. 32
    • C. 56
    • D. 49
    • Discuss
    • 4. A certain job was assigned to a group of women to do it in 20 days. But 12 women did not turn up for the job and the remaining did the job in 32 days. The original number of women in the group was?

    • Options
    • A. 36
    • B. 32
    • C. 22
    • D. 28
    • Discuss
    • 5. If a soldier fires 7 shots from a gun in 12 minutes then find the total number of shots fired by the man in 3/2 hrs.

    • Options
    • A. 45
    • B. 44
    • C. 46
    • D. 47
    • Discuss
    • 6. A, B and C can do a piece of work in 72, 48 and 36 days respectively. For first p/2 days, A & B work together and for next ((p+6))/3days all three worked together. Remaining 125/3% of work is completed by D in 10 days. If C & D worked together for p day then, what portion of work will be remained?

    • Options
    • A. 1/5
    • B. 1/6
    • C. 1/7
    • D. 1/8
    • Discuss
    • 7. Lasya alone can do a work in 16 days. Srimukhi?s efficiency is 20 % lesser than that of Laya. If Rashmi and Srimukhi together can do the same work in 12 days, then find the efficiency ratio of Rashmi to that of Lasya?

    • Options
    • A. 19 : 7
    • B. 30 : 19
    • C. 8 : 15
    • D. 31 : 17
    • Discuss
    • 8. Sharan and Mayukh, working together, can complete a task in 18 days. However, Mayukh works alone and leaves after completing 1/3 of the task. Then, Sharan takes over and completees the remaining work by himself. As a result, the duo could complete the task in 40 days. How many days would Sharan alone have taken to do the job if Mayuk' had worked faster than Sharan ?

    • Options
    • A. 24
    • B. 45
    • C. 72
    • D. 30
    • Discuss
    • 9. The ratio of efficiencies of P, Q and R is 2 : 3 : 4. While P and R work on alternate days and Q work for all days. Now the work completed in total 10 days and the total amount they get is Rs. 1200. Find the amount of each person(respectively).

    • Options
    • A. 200, 600, 400
    • B. 400, 600, 200
    • C. 600, 200, 400
    • D. 400, 200, 600
    • Discuss
    • 10. A town having teenagers(boys & girls) of 5000 requires 150 litre of water per head. It has a tank measuring 20 m × 15 m × 5 m. The water of this tank will sufficient for ____ days.

    • Options
    • A. 8
    • B. 6
    • C. 4
    • D. 2
    • Discuss


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