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Home Aptitude Time and Work See What Others Are Saying!
  • Question
  • 6 boys and 8 girls can do job in 10 days , 26 boys & 48 women do work in 2 days. Find time taken by 15 boys and 20 girls to do same work ?


  • Options
  • A. 2 days
  • B. 3 days
  • C. 4 days
  • D. 5 days

  • Correct Answer
  • 4 days 

    Explanation

    One day work of 6 boys and 8 girls is given as 6b + 8g = 1/10 -------->(I)

     


    One day work of 26 boys and 48 women is given as 26b + 48w = 1/2 -------->(II)

     

    Divide both sides by 2 in (I) and then multiply both sides by 5

    Now we get, 15b + 20g = 1/4.

    Therefore, 15 boys and 20 girls can do the same work in 4 days.

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

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      A train 550 metres long is running with a speed of 55 km per hour. In what time will it pass a signal post?

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    • C. 42 sec
    • D. 36 sec
    • Discuss
    • 2. 
      95 3.7 ÷ 95 0.9989 = 95 ?

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    • A. 1.9
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    • 3. 
      If the discount on a certain sum in 2 years at a certain rate is $ 150 and the interest in 3 years is $ 240. Find the sum and the rate of interest.

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    • A. $ 2400, 3 1 % 3
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    • C. $ 2200, 5 1 % 3
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    • 4. 
      √625 x 14 x 11 is equal to:
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    • 5. How much time will it take for an amount of Rs. 450 to yield Rs. 81 as interest at 4.5% per annum of simple interest?

    • Options
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    • 6. The ratio of expenditure and savings is 3 : 2 . If the income increases by 15% and the savings increases by 6% , then by how much percent should his expenditure increases?

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    • Options
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