796 . A circular flower bed has diameter 4m. The flower bed is increased so that the diameter is now 12 m. How many times longer is the new flower bed?
  • A. 9
  • B. 3
  • C. 32
  • D. 8
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797 . A circular grass walk of 2 feet wide surrounded a pond of 100 fet in diameter. In terms of π, how many square feet grass walk are there?
  • A. 204 π
  • B. 102 π
  • C. 404 π
  • D. 202 π
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798 . A circular logo is enlarged to fit the lid of a jar. The new diameter is 50 percent larger than the original. By what percentage has the area of the logo increased?
  • A. 50
  • B. 80
  • C. 100
  • D. 125
  • E. None of these
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799 . A circular swimming pool is to be filled with water. If the radius of the pool is 2m and the height of the pool is 7m, what volume of water will be required to fill the pool ?
  • A. 88m^3
  • B. 176m^3
  • C. 25.14m^3
  • D. none of these
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800 . A circular wheel 28 inches in diameter rotates (moves) the same number of inches per second as a circular wheel 35 inches in diameter. If the smaller wheel makes x revolutions per second, how many revolutions per minute does the larger wheel make in terms of x?
  • A. 12x
  • B. 48x
  • C. 24x
  • D. 36x
  • E. None of these
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801 . A circular wheel 28 inches in diameter rotates the same number of inches per second as a circular wheel 35 inches in diameter. If the smaller wheel makes x revolutions per second, how many revolutions per minutes does the larger wheel make in terms of x?
  • A. 12x
  • B. 24x
  • C. 36x
  • D. 48x
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802 . A cistern can be filled in 10 hours but it takes 12 hours due to a leak in its bottom. If the cistern is full, then the time that the leak will take to empty it is:
  • A. 60 min
  • B. 80 h
  • C. 90 h
  • D. 60 h
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803 . A cistern is normally filled with eater in 10 hours but takes 5 hours longer to fill because of a leak in its bottom . If the cistern is full, the leak will empty the cistern in -
  • A. 20 hours
  • B. 30 hours
  • C. 40 hours
  • D. 50 hours
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জনতা ও রূপালী ব্যাংক- অফিসার ১৩.১২.২০১৯
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804 . A class has 12 boys and 18 girls. What fraction of the class are boys?
  • A. 2/5
  • B. 3/5
  • C. 4/5
  • D. 3/2
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805 . A class of 120 has 25% girls. If 10% of the boys and 20% of the girls attended a picnic then what percentage of the class attended the picnic?
  • A. 20%
  • B. 25%
  • C. 13%
  • D. 12.5%
  • E. None of these
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806 . A class of 50 girls and 70 boys sponsored a party. If 40% of the girls and 50% of the boys attended the party, approximately what percent of the class attended?
  • A. 40
  • B. 42
  • C. 44
  • D. 46
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807 . A class of 80 students has 25% girls. If 10% of the boys and 20% of the girls attended a picnic then what percentage of the class attended the picnic ?
  • A. 20%
  • B. 25%
  • C. 13%
  • D. 12.5%
  • E. None of these
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808 . A clock falls behind 10 minutes each day. How many days will it take to reach a point where the clock will indicate the correct time?
  • A. 36
  • B. 40
  • C. 72
  • D. 90
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809 . A clock is started at noon. By 10 minutes past 5, the hour hand has turned through :
  • A. 145 degree
  • B. 150 degree
  • C. 155 degree
  • D. 160 degree
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810 . A clock loses ( falls behind ) 10 minutes each day. How many days will take to reach a point where the clock will indicate the correct time ?
  • A. 36
  • B. 72
  • C. 120
  • D. None of these
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Bangladesh Bank - Officer - 2001
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