30000+ Important MCQs for POLICE SI

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Learn POLICE SI MCQs with answers [Page 7 of Department 40]

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64) If A and B together can complete a piece of work in 15 days and B alone in 20 days, in how many days can A alone complete the work?

  • (A) 60
  • (B) 45
  • (C) 40
  • (D) 30
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Correct Answer - Option (A)

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Ankit Singh • 6.54K Points
Tutor III Math

65) If A and B together can complete a work in 18 days, A and C together in 12 days, and B and C together in 9 days, then B alone can do the work in:

  • (A) 18 days
  • (B) 24 days
  • (C) 30 days
  • (D) 40 days
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Correct Answer - Option (B)

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Ankit Singh • 6.54K Points
Tutor III Math

66) A can complete a piece of work in 18 days, B in 20 days and C in 30 days, B and C together start the work and forced to leave after 2 days. The time taken by A alone to complete the remaining work is:

  • (A) 10 days
  • (B) 12 days
  • (C) 15 days
  • (D) 16 days
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Correct Answer - Option (C)

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A

Ankit Singh • 6.54K Points
Tutor III Math

67) Working 5 hours a day, A can Complete a work in 8 days and working 6 hours a day, B can complete the same work in 10 days. Working 8 hours a day, they can jointly complete the work in:

  • (A) 3 days
  • (B) 4 days
  • (C) 4.5 days
  • (D) 5.4 days
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Correct Answer - Option (A)

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Ankit Singh • 6.54K Points
Tutor III Math

68) Ganga and Saraswati, working separately can mow field in 8 and 12 hours respectively. If they work in stretches of one hour alternately. Ganga is beginning at 9 a.m., when will the moving be completed?

  • (A) 6:20 PM
  • (B) 6:30 PM
  • (C) 6:36 PM
  • (D) 6:42 PM
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Correct Answer - Option (B)

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A

Ankit Singh • 6.54K Points
Tutor III Math

69) If 10 men can do a piece of work in 12 days, the time taken by 12 men to do the same piece of work will be:

  • (A) 12 days
  • (B) 10 days
  • (C) 9 days
  • (D) 8 days
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Correct Answer - Option (B)

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A

Ankit Singh • 6.54K Points
Tutor III Math

70) To complete a work, A takes 50% more time than B. If together they take 18 days to complete the work, how much time shall B take to do it?

  • (A) 30 days
  • (B) 35 days
  • (C) 40 days
  • (D) 45 days
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Correct Answer - Option (A)

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