1 . A is thrice as good as workman as B and therefore is able to finish a job in 60 days less than B. Working together, they can do it in :
  • A. 20 days
  • B. 22.5 days
  • C. 25 days
  • D. 30 days
  • E. 15 days
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Bangladesh Bank - Assistant Director - 2011
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2 . 20 workers can finish a task in 30 days. How many additional workers are needed to finish the same task in 25 days?
  • A. 6
  • B. 8
  • C. 10
  • D. 12
  • E. None of these
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3 . If 4 workers can do a job in 48 days, how long will it take 3 workers to finish the same job ?
  • A. 76
  • B. 72
  • C. 70
  • D. None of these
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4 . If 6 workers can complete 9 identical jobs in 3 days, how long (in days) will it take 4 workers to complete 10 such jobs?
  • A. 5
  • B. 4
  • C. 6
  • D. 3
  • E. None of these
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5 . K produces 100 parts twice as fast as G does. G produces 100 parts in 40 minutes. If each produces parts at a constant rate, how many parts will K produces in 6 minutes?
  • A. 30
  • B. 25
  • C. 20
  • D. 15
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Bangladesh Bank - Assistant Director - 2006
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6 . Susan can type 10 pages in 5 minutes. Mary can type 5 pages in 10 minutes. Working together , how many pages can they type in 30 minutes ?
  • A. 15
  • B. 25
  • C. 65
  • D. 75
  • E. 20
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Bangladesh Bank - Assistant Director - 2009
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7 . Three workers can do a job in 12 days. Two of the workers work twice as fast as the third. How long would it take one of the faster workers to do the job himself ?
  • A. 24
  • B. 30
  • C. 32
  • D. None of these
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Bangladesh Bank - Officer - 2001
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8 . Tow workers A and B are engaged to do a work. A working alone takes 8 hours more to complete the job than if both worked together. If B worked along, he would need 4.5 hours more to complete the job than they both working together. What time would they take to do the work together?
  • A. 4 hours
  • B. 5 hours
  • C. 6 hours
  • D. 7 hours
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Bangladesh Bank - Assistant Director - 2014
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