1111 . A takes twice as much time as B or thrice as much time as C to finish a piece of work. Working together, they can finish the work in 2 days. B can do the work alone in:

A. 4 days
B. 6 days
C. 8 days
D. 12 days

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Answer: Option B

Explanation:

1112 . A takes twice as much time as B or thrice as much time as C to finish a piece of work . Working together , they can finish the work in 2 days . B can do the work alone in :

A. 6 days
B. 8 days
C. 12 days
D. 4 days

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Answer: Option A

Explanation:

ধরি,

B এর সময় লাগে x দিন

A এর সময় লাগে 2x দিন

এবং, C এর সময় লাগে y দিন

A এর সময় লাগে 3y দিন

এখন, 2x = 3y

y = 2x/3

A : B : C = 2x : x : 2x/3 = 6x : 3x : 2x

A,B,C একত্রে 1 দিনে করে ( 1/6x + 1/3x + 1/2x) = 1/x অংশ

1/x = 1/2

x = 2

B কাজটি করে ( 3 × 2) = 6 দিনে।

Bangladesh Bank - Officer(Cash) - 2016

A. 1.25%
B. 3.75%
C. 6.25%
D. 6.67%
E. None of them

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Answer: Option D

Explanation:

To find the percent of sodium chloride in the remaining solution, we'll calculate the initial amount of sodium chloride and then find the percentage after 2500 gallons of water evaporate.

Initial amount of sodium chloride = 5% of 10,000 gallons Initial amount of sodium chloride = (5/100) * 10,000 = 500 gallons

Initially, there are 500 gallons of sodium chloride in the solution.

After 2500 gallons of water evaporate, there are 10,000 - 2500 = 7500 gallons of liquid remaining in the tank.

Now, to find the percentage of sodium chloride in the remaining solution:

Percentage of sodium chloride = (Amount of sodium chloride / Total volume of solution) * 100

Percentage of sodium chloride = (500 gallons / 7500 gallons) * 100

Percentage of sodium chloride ≈ 6.67%

So, the remaining solution will be approximately 6.67% sodium chloride.

1114 . A tank has two leakages. The first leakage alone can empty the tank in 9 minutes and the second alone would have done it in 6 minutes. If water leaks out at a constant rate. how long does it take both the leakage together to empty the tank ?

A. 3.6 min
B. 3.1 min
C. 3.5 min
D. 4.0 min

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Answer: Option A

Explanation:

দুটি বাদে সবগুলো rose

দুটি বাদে সবগুলো tulip

দুটি বাদে সবগুলো daisy

স্পষ্ট বোঝা যাচ্ছে মোট ফুল তিনটি এবং প্রতি প্রকারের ফুল আছে ১টি করে।

1115 . A tank is 30% full with water. If 18 liters of water is added the tank become 3/4 full. What is the capacity of the tank?

A. 36
B. 40
C. 45
D. 56

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Answer: Option B

Explanation:

3/4 ≡ 3/4 x 100% = 75%

Change in = 75% - 30% = 45%

Now, 45% capacity = 18 liter

So, 100% capacity = 18 x 100 / 45 = 40 liter

1116 . A tank is 40% full of water. If 9 liters of water is removed, the tank becomes 1/4th full. What is the capacity of the tank in liter?

A. 20
B. 30
C. 40
D. 60

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Answer: Option D

Explanation:

Let's call the capacity of the tank "C" liters. Initially, the tank is 40% full of water, which means it contains 0.4C liters of water. When 9 liters of water are removed, it becomes 1/4 full, which means it contains (1/4)C liters of water.

We can set up an equation using this information:

0.4C - 9 = (1/4)C

Now, let's solve for C:

0.4C - 9 = (1/4)C

Multiply both sides of the equation by 4 to eliminate fractions:

1.6C - 36 = C

Subtract C from both sides:

0.6C - 36 = 0

Now, add 36 to both sides:

0.6C = 36

Finally, divide by 0.6 to find the capacity of the tank:

C = 36 / 0.6 = 60

So, the capacity of the tank is 60 liters.

1117 . A tank is filled in 5 hours by three pipes A,B and C The pipe C is twice as fast as B and B is twice as fast as A How much time will pipe A alone take to fill the tank?

A. 20 hours
B. 25 hours
C. 35 hours
D. None of these

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Answer: Option C

Explanation:

Suppose pipe A alone takes x hours to fill the tank.
Then, pipes B and C will take x/2 and x/4 hours respectively to fill the tank.
∴1/x + 2/x + 4/x = 1/5
⇒7/x = 1/5
⇒x = 35hours

সমন্বিত ৬ (ব্যাংক) ও ২ টি আর্থিক প্রতিষ্ঠান - সিনিয়র অফিসার ১০.০৬.২০১৯

A. 3 h 30 m
B. 3 h 45 m
C. 4 h30 m
D. 4 h

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Answer: Option C

Explanation:

সমন্বিত ৭ ব্যাংক ও ১টি আর্থিক | সিনিয়র_অফিসার | 27-11-2021

A. lose Tk. 500
B. loss Tk. 1,000
C. save Tk. 1,500
D. save Tk. 1,000

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Answer: Option D

Explanation:

1120 . A television service centre can process 8 television in 18 minutes. How many televisions can it process in 3 houres at this rate?

A. 150
B. 45
C. 80
D. 60

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Answer: Option C

Explanation:

1121 . A third of Karim’s marks is Mathematics exceeds a half of his marks in Social Studies by 30, if Karim got 240 marks in two subjects together, how many marks did he get in Social Studies?

A. 88
B. 98
C. 60
D. 122

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Answer: Option C

Explanation:

Hints: ধরি, . math mark = m, social studies = s

1/3 m = 1/2s + 30

এবং, m + s = 240

m = 240 - s

তাহলে, 1/3(240 - s) = 1/2 s + 30

80 - s/3 = 1/2 s + 30

1/2s + s/3 = 80 - 30

3S + 2S / 6 = 50

5s = 300

S = 60

এখানে সঠিক উত্তর নাই

1122 . A time-study specialist has set the production rate for each worker on a certain job at 22 units every 3 hours. At this rate what is the minimum number of workers that should be put on the job if at least 90 units are to be produced per hour?

A. 12
B. 13
C. 18
D. 30

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Answer: Option B

Explanation:

The rate for each worker can be expressed as 22/3 units per hour.

We can let n = the number of workers needed to produce 90 units per hour, and we have:

n(22/3) = 90

or,22n = 270

∴ n = 270/22 = 12.2,

so there must be at least 13 workers.(ans)

দুর্নীতি দমন কমিশনের সহকারী পরিচালক-১২.০৪.২০১৩

A. 5
B. 8
C. 12
D. 13

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Answer: Option D

Explanation:

The rate for each worker can be expressed as 22/3 units per hour.

We can let n = the number of workers needed to produce 90 units per hour, and we have:

n(22/3) = 90

or,22n = 270

∴ n = 270/22 = 12.2,

so there must be at least 13 workers.(ans)

1124 . A time study specialist has set the production rate for each worker on a job at 22 units every three hours. At this rate, what is the minimum number of workers that should be put on the job, if at least 90 units are to be produced per hour?

A. 5
B. 8
C. 12
D. 13
E. None of these

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Answer: Option D

Explanation:

The rate for each worker can be expressed as 22/7 units per hour.

let, n = the number of workers needed to produce 90 units per hour, and we have:

so, n(22/3) = 90

or, 22n = 270

∴n = 270/22 = 12.2, so there must be at least 13 workers.

ans: 13 workers

1125 . A TK. 30,000 prize is to be divided among three employees in the ratio of 2:3:5 . What is the value of the smallest share ?

A. 9,000
B. 7,500
C. 6,000
D. 4,500

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Answer: Option C

Explanation:

ধরি,

অনুপাতের রাশিগুলোর মান = X

তাহলে,প্রদত্ত অনুপাত হবে 2X : 3X : 5X

প্রশ্নমতে,

বা,2X + 3X + 5X = 30000

বা,10X = 30000

বা,X = 3000

সুতরাং, smallest share is 2X = 2×3000

= 6000

Bangladesh Bank - Officer - 2001

1111 . A takes twice as much time as B or thrice as much time as C to finish a piece of work. Working together, they can finish the work in 2 days. B can do the work alone in:

1112 . A takes twice as much time as B or thrice as much time as C to finish a piece of work . Working together , they can finish the work in 2 days . B can do the work alone in :

1113 . A tank contains 10,000 gallons of a solution that is 5 percent sodium chloride by volume. If 2500 gallons of water evaporate from the tank, the remaining solution will be approximately what percent sodium chloride?

1114 . A tank has two leakages. The first leakage alone can empty the tank in 9 minutes and the second alone would have done it in 6 minutes. If water leaks out at a constant rate. how long does it take both the leakage together to empty the tank ?

1115 . A tank is 30% full with water. If 18 liters of water is added the tank become 3/4 full. What is the capacity of the tank?

1116 . A tank is 40% full of water. If 9 liters of water is removed, the tank becomes 1/4th full. What is the capacity of the tank in liter?

1117 . A tank is filled in 5 hours by three pipes A,B and C The pipe C is twice as fast as B and B is twice as fast as A How much time will pipe A alone take to fill the tank?

1118 . A tap can fill a tank in 6 hours . After half the tank is filled another simila tap is opened. What is the total time taken to fill the tank completely?

1119 . A tea merchant blends 2 kinds of tea, putting in 3 parts of a Tk. 25 per kg grade to 1 part of a Tk. 15 per kg. If the mixture is changed to 1 part of the Tk. 25 per kg grade to 3 parts of the less expensive grade, how much will the shop lose or save in blending 200 kg?

1120 . A television service centre can process 8 television in 18 minutes. How many televisions can it process in 3 houres at this rate?

1121 . A third of Karim’s marks is Mathematics exceeds a half of his marks in Social Studies by 30, if Karim got 240 marks in two subjects together, how many marks did he get in Social Studies?

1122 . A time-study specialist has set the production rate for each worker on a certain job at 22 units every 3 hours. At this rate what is the minimum number of workers that should be put on the job if at least 90 units are to be produced per hour?

1123 . A time study specialist has set the production rate for each worker on a job at 22 units every therre hours. At this rate, what is the minimum number of workers that should be put on the job, if at least 90 units are to be produced per hour?

1124 . A time study specialist has set the production rate for each worker on a job at 22 units every three hours. At this rate, what is the minimum number of workers that should be put on the job, if at least 90 units are to be produced per hour?

1125 . A TK. 30,000 prize is to be divided among three employees in the ratio of 2:3:5 . What is the value of the smallest share ?

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