916 . A jar contains a mixture of oil and water in the ratio 22 :3 . 50 litres of the mixture was taken out and 25 litres of water was added to it. If water was 34% in the resultant mixture, what was the initial quantity of the mixture (in litres ) in the jar?

A. 175
B. 150
C. 75
D. 125

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Answer: Option D

Explanation:

Let, Oil = 22X & Water = 3X

After removing 22 litre

Oil removed = (22x50)/25 = 44; Here, [22+3 = 25] [removed= 50] [Oil ratio= 22]

Water Removed = (3x50)/25 = 6;Here, [22+3 = 25] [removed= 50] [Water ratio= 3]

Now as per the Question,

>22X-44 : 3X-6+25 = 66:34 [ 34% water So Oil 66% SO ratio 66:34 ]

>374X-748 = 99X+627

>X= 5

So Initial Quantity= 22x5+3x5 = 125 litre. Ans.

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917 . A jar contains milk and water in the ratio 5: 1. If the quantity of milk is more than that of water by 8 liters, then what is the quantity of water?

A. 1.5 liter
B. 2 liter
C. 6 liter
D. 8 liter

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Answer: Option B

Explanation:

ধরি, দুধের পরিমান = 5x
এবং পানির পরিমান = x
প্রশ্নমতে, 5x - x = 8
⇒ 4x = 8
.:. x = 2 লিটার

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918 . A jar contains red balls and green balls in the ratio 3:1. If the jar contains only the two types of balls, which of the following cannot be the number of balls in the jar ?

A. 96
B. 80
C. 72
D. 54

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Answer: Option D

Explanation:

here, sum of ratio = 3 + 1 = 4

96/4 = 24 (divisible)

80/4 = 20 (divisible)

72/4 = 18 (divisible)

54/4 # (it is not divisible by round figure)

so, ans is 54.

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Bangladesh Bank - Officer - 2001

A. 8
B. 10
C. 4
D. 6

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Answer: Option B

Explanation:

পাঁচটি সবুজ বল যোগ করে,

৪x + ৫ = ৫x

বা, x = ৫

সাদা বলের সংখ্যা = ২ × x = ২ × ৫ = ১০

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920 . A jar contains white, red and green marbles in the ratios 2: 3: 5 six more green marbles are added to the jars and then the ratio becomes 2: 3: 7 Hoe may white marbles are there in the jar?

A. 5
B. 6
C. 9
D. 10

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Answer: Option B

Explanation:

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Basic bank recruitment 2018; auditor 26.01.2018 || Image 2018

A. 3.6 sec
B. 18 sec
C. 36 sec
D. 72 sec
E. None of these

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Answer: Option C

Explanation:

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922 . A laborer is paid Tk.20 per hour for an 8-hour day. If he works overtime (above 8 hours) in a single day, he is paid 1.5 times the rate he is paid for regular hours. If the laborer receive Tk.200 for a single day's work. How long did he work on that day?

A. 9 hours 20 minutes
B. 8 hours 50 minutes
C. 6 hours 20 minutes
D. 9 hours 50 minutes

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Answer: Option A

Explanation:

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923 . A ladder is placed against a wall such that its foot is at a distance of 2.5 m from the and its top reaches a window 6 m about ground. Find the length of the ladder.

A. 6.5 m
B. 8.5
C. 4.5
D. 2.5 m

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Answer: Option A

Explanation:

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জনতা ও রূপালী ব্যাংক- অফিসার ১৩.১২.২০১৯

A. 7m
B. 35m
C. 5m
D. 25m

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Answer: Option C

Explanation:

Applying the Pythagorean theorem:

L^2 = (distance to the wall)^2 + (height)^2 L^2 = 4^2 + 3^2 L^2 = 16 + 9 L^2 = 25

Taking the square root of both sides:

L = √25 L = 5

Therefore, the length of the ladder is 5 meters.

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925 . A leading library charges c cents for the first week that a book is loaned and f cents for each day over one week. What is the cost for taking out a book for d days. Where d is greater than?

A. c +fd
B. cd
C. c +f(d-7)
D. cd +f

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Answer: Option C

Explanation:

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926 . A library has an avearage of 510 visitors on Sunday and 240 on other days. What is the average number of visitors per day in the month of june beginning with a sunday?

A. 300
B. 285
C. 290
D. 295

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Answer: Option B

Explanation:

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Probashi Kallyan Bank-Officer (Cash)-25-09-2021

A. (12, 4)
B. (12, 8)
C. (6, 4)
D. (6,2)

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Answer: Option D

Explanation:

Coordinates of the midpoint of a line segment made by joining two points are the averages of the respective coordinates of the two points.

So, coordinate of the midpoint is {(8 + 4)/2 , ( - 2 + 6)/2} = (6,2)

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928 . A loan was repaid in two annual installments of Tk.121 each. If the rate of interest be 10% per annum compounded annually the sum borrowed was.

A. 217.80
B. 280
C. 200
D. 210

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Answer: Option D

Explanation:

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929 . A machine can copy six pages in 9 seconds. How many pages can it copy in 24 minutes?

A. 12
B. 16
C. 36
D. 960
E. None of these

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Answer: Option D

Explanation:

24 min × 60 = 1440 sec.

Needs 9 sec to copy 6 pages

1 sec to copy 6/9 pages

1440 sec to copy = (6×1440p/9 = 960 pages

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930 . A machine fills a bag with 7 ounces of potato chips in 3.5 seconds. At this rate, how many seconds will take the machine to fill a bag with 15 ounces of potato chips?

A. 6.5
B. 7.0
C. 7.5
D. 8.0

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Answer: Option C

Explanation:

Filling rate = 7/3.5 = 2 ounces per second

Time required = 15/2 = 7.5 seconds

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916 . A jar contains a mixture of oil and water in the ratio 22 :3 . 50 litres of the mixture was taken out and 25 litres of water was added to it. If water was 34% in the resultant mixture, what was the initial quantity of the mixture (in litres ) in the jar?

917 . A jar contains milk and water in the ratio 5: 1. If the quantity of milk is more than that of water by 8 liters, then what is the quantity of water?

918 . A jar contains red balls and green balls in the ratio 3:1. If the jar contains only the two types of balls, which of the following cannot be the number of balls in the jar ?

919 . A jar contains white, red and green marbles in the ratio 2 : 3 : 4. Five more green marbles are added to make the ratio 2 : 3 : 5. How many white marbles are there in the jar?

920 . A jar contains white, red and green marbles in the ratios 2: 3: 5 six more green marbles are added to the jars and then the ratio becomes 2: 3: 7 Hoe may white marbles are there in the jar?

921 . A jogger running at 9 km/hr alongside a railway track is 240 meters ahead of the engine of a 120 meters long train running at 45 km/hr in the same direction. In how much time will the train pass the jogger?

922 . A laborer is paid Tk.20 per hour for an 8-hour day. If he works overtime (above 8 hours) in a single day, he is paid 1.5 times the rate he is paid for regular hours. If the laborer receive Tk.200 for a single day's work. How long did he work on that day?

923 . A ladder is placed against a wall such that its foot is at a distance of 2.5 m from the and its top reaches a window 6 m about ground. Find the length of the ladder.

924 . A ladder rests against a wall that is perpendicular to the ground. If the bottom of the ladder is 4m away from the bottom of the wall, while the top of the ladders is at a height of 3m what is the length of he ladder?

925 . A leading library charges c cents for the first week that a book is loaned and f cents for each day over one week. What is the cost for taking out a book for d days. Where d is greater than?

926 . A library has an avearage of 510 visitors on Sunday and 240 on other days. What is the average number of visitors per day in the month of june beginning with a sunday?

927 . A line segment is drawn from point (8, -2) to point (4,6). The coordinates of the mid point of this line segment are--

928 . A loan was repaid in two annual installments of Tk.121 each. If the rate of interest be 10% per annum compounded annually the sum borrowed was.

929 . A machine can copy six pages in 9 seconds. How many pages can it copy in 24 minutes?

930 . A machine fills a bag with 7 ounces of potato chips in 3.5 seconds. At this rate, how many seconds will take the machine to fill a bag with 15 ounces of potato chips?

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