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  • Question
  • 39 persons can repair a road in 12 days, working 5 hours a day. In how many days will 30 persons, working 6 hours a day, complete the work?


  • Options
  • A. 10
  • B. 13
  • C. 18
  • D. 136

  • Correct Answer
  • 13 

    Explanation

    Since 39 persons can repair a road by working 5 hours in a day in 12 days.
    ? 1 persons can repair a road by working 5 hours in a day in 39 x 12 days.
    ? 1 persons can repair a road by working 1 hours in a day in 39 x 12 x 5 days.
    ? 30 persons can repair a road by working 1 hours in a day in 39 x 12 x 5 / 30 days.
    ? 30 persons can repair a road by working 6 hours in a day in 39 x 12 x 5 / 30 x 6 days.
    ? 30 persons can repair a road by working 6 hours in a day in 39 x 2 x 1 / 6 days.
    ? 30 persons can repair a road by working 6 hours in a day in 39 x 1 x 1 / 3 days.
    ? 30 persons can repair a road by working 6 hours in a day in 13 days.


  • More questions

    • 1. 
      A rectangle has 20 cm as its length and 200 sq cm as its area. If the area is increased by 1 1/ 5 time the original area by increase its length only then the perimeter of the rectangle so formed (in cm) is

    • Options
    • A. 72
    • B. 60
    • C. 64
    • D. 68
    • Discuss
    • 2. 
      The perimeter of an isosceles triangle is 26 cm while equal sides together measure 20 cm. The third side and each of the equal sides are respectively.

    • Options
    • A. 6 cm and 10 cm
    • B. 8 cm and 9 cm
    • C. 10 cm and 8 cm
    • D. 14 cm and 6 cm
    • Discuss
    • 3. 
      If the diagonals of a rhombus are 4.8 cm 1.4 cm, then what is the perimeter of the rhombus?

    • Options
    • A. 5 cm
    • B. 10 cm
    • C. 12 cm
    • D. 20 cm
    • Discuss
    • 4. 
      The average of first nine multiples of 3 is?

    • Options
    • A. 12.0
    • B. 12.5
    • C. 15.0
    • D. 18.5
    • Discuss
    • 5. 
      A number 15 is divided into 3 parts which are in Arithmetic Progression (A.P) and the sum of their squares is 83. What will be the smallest number?

    • Options
    • A. 5
    • B. 3
    • C. 6
    • D. 8
    • Discuss
    • 6. 
      Find the number of combinations that can be formed with 5 oranges, 4 mangoes and 3 bananas, when one fruit of each kind is taken.

    • Options
    • A. 60
    • B. 120
    • C. 110
    • D. 75
    • Discuss
    • 7. 
      The diagonals of two squares are in the ratio of 3 : 2. Find the ratio of their areas.

    • Options
    • A. 9 : 4
    • B. 9 : 2
    • C. 9 : 5
    • D. 9 : 7
    • Discuss
    • 8. 
      The diagonals of a squares is 4?2 cm. The diagonal of another square whose area is double that of the first square is

    • Options
    • A. 8 cm
    • B. 8?2 cm
    • C. 4?2 cm
    • D. 6 cm
    • Discuss
    • 9. 
      The lengths of three line segments (in cm) are given in each of the four cases. Which one of the following cases is not suitable to be the three sides of a triangle?

    • Options
    • A. 2, 3, 4
    • B. 2, 3, 5
    • C. 2, 4, 5
    • D. 3, 4, 5
    • Discuss
    • 10. 
      If a =
      ? 3 - ? 2
      , b =
      ? 3 + ? 2
      , then the value of
      ?3 + ?2 ?3 - ?2
      a 2
      +
      b 2
      is :
      b a

    • Options
    • A. 900
    • B. 970
    • C. 1030
    • D. 930
    • Discuss


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