1546 . Employees of a discount appliance store receive an additional 20% off of the lowest price on an item. If an employee purchases a dishwasher during a 15% off sale, how much will he pay if the dishwasher originally cost $450?

A. $280.90
B. $287
C. $292.50
D. $306

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Answer: Option D

Explanation:

Price at 15% off sale = 450 - 15% of 450 = 450 - 67.5 = $382.5

Price at additional 20% discount = 382.5 - 20% of 382.5 = 382.5 - 76.5 = $306

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1547 . Every 3 minutes, 4 liters of water are poured into a 2,000-liter tank. After 2 hours, what percent of the tank is full?

A. 0.4%
B. 4%
C. 8%
D. 12%

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Answer: Option C

Explanation:

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1548 . Every 3 minutes, 4 litres of water are poured into a 2,000 - litre tank , after 2 hours, what percent of the tank will be full?

A. 0.4%
B. 4%
C. 8%
D. 12%

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Answer: Option C

Explanation:

Hints: প্রতি 3 mim ও একবার ঢালা হলে, 2 hours এ ঢালা হবে 2 × 60 /3 = 40 বার

40 বার 4 litter করে মোট পানি ঢালা হয় 40 × 4 litter

Tank full = 4 × 40 / 2000 × 100% = 8%.

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অফিসার (সাধারণ) ২৭.১২. ২০১৯

A. 80
B. 84
C. 98
D. 42

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Answer: Option B

Explanation:

As per the given in question ,
Total distance covered in two weeks = 2 (3 + 4 + 5 + 6 + 7 + 8 + 9) miles
Total distance covered in two weeks = 2 × 42 = 84 miles
Therefore , Gin jogs 84 miles in 2 weeks

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1550 . Excluding stoppages, the speed of a bus is 54 kmph and including stoppages, it is 45 kmph. For how many minutes does the bus stop per hour?

A. 10
B. 9
C. 12
D. 20

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Answer: Option A

Explanation:

Hints : In case of 1 hour,

Without stoppages, the bus goes 54 km

with stoppages the bus goes 45 km

Distance ( 54 - 45) = 9 km

Nows, it goes 54 km in 60 mins

it goes 1 km in 60/ 54 km

if goes 9 km in 60 × 9/ 54 = 10 mins

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1551 . Experts say that 25% of all serious bicycle accidents involve head injuries and of all such head injuries, 80% are fatal. What percentage of all serious bicycle accidents involve fatal head injuries?

A. 6%
B. 20%
C. 55%
D. 105%

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Answer: Option B

Explanation:

let, Total number of accidents is 100

given, 25% of of serious bicycle accidents involved head injury and 80% head injuries are fatal

So,percentage of serious bicycle accidents involve fatal head injuries = 80% * 25% *100

= (80/100) *(25/100)*100 = 20

ans: 20%

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1552 . f the length of each of the sides of three squeare garden's plots us increases by 50 percents, by what percent is the sum of the areas of the three plots increased?

A. 125%
B. 150%
C. 200%
D. 375%

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Answer: Option D

Explanation:

3 টি বর্গক্ষেত্রের প্রতিটির দৈর্ঘ্য 50% বৃদ্ধি পায়

1 টি বর্গক্ষেত্রের ক্ষেত্রফল বৃদ্ধি পায় ( 50 + 50 + 50× 50/100) % = ( 100 + 25) = 125 %

3 টি বর্গক্ষেত্রের ক্ষেত্রফল বৃদ্ধির যোগফল = ( 125 + 125 + 125) % = 375%

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1553 . Fahim and Rishad both started at the same time from point A to point B at speeds of 52 kmph and 39 kmph respectively on the same road. As soon as Fahim reaches point B, he turns back, stats toward point A on the same road, and meets Rishad on the way. How far from point B do the two of them meet, if the distance between the points is 70 km?

A. 20 km
B. 30 km
C. 10 km
D. 25 km
E. None of these

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Answer: Option C

Explanation:

ব্যাখাঃ

মনে করি, B বিন্দু থেকে x কিমি দূরে তারা মিলিত হবে।

প্রশ্নমতে, ( 70 + x)/52 = ( 70 - x) /39

39 (70 + x) = 52 ( 70 - x)

2730 + 39x = 3640 - 62x

39x + 52x = 3640 - 2730

91x = 910

x = 10

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1554 . Farhana deposited Tk.10000 in a bank at 13.25% interest rate compounded annually. At the end of the second year, the total amount including interest will become how much?

A. Tk.12826
B. Tk.11844
C. Tk.13000
D. Tk.14826

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Answer: Option A

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1555 . Faruk can complete a task in 20 days. He gets 2 assistants- each of whome can work as fast as he does. If all of them work together for 5 days, what percentage of the task will be complete?

A. 40%
B. 50%
C. 60%
D. 66.66%

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Answer: Option B

Explanation:

This can be done easily by the following way.

যেহেতু ফারুকের দুই. Assistant তার সমান কাজ করবে ( 1/2 each), so total কাজ করতে তিনজনের মোট 20/2 = 10 দিন লাগবে।

So 5 days এ 50% কাজ হবে।

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1556 . Faruk can do a work in 12 days and Salam can do the same work in 8 days. If Faruk, Salam and Babu work together, they can complete the work in 4 days. How many days will it take Babu to complete the work alone?

A. 16
B. 20
C. 24
D. 32

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Answer: Option C

Explanation:

Faruk can do a work in 12 days and Salam can do the same work in 8 days. If Faruk , Salam and Babu work together , they can complete the work in 4 days . How many days will it take Babu to complete the work alone ?

in 1 day faruk can do 1/12 unit of work

in 1 day salma can do 1/8 unit of work

let asssume,

i 1 day babu can do 1/x unit of work

in 1 day babu , faruk and salma can do = (1/12 + 1/8 + 1/x) = 5x + 24/24x unit of work

given that, in 4 days they can complete 1 unit of work together

so in 1 day the can do 1/4 unit of work

hence , 5x + 24/24x = 1/4

20x + 96 = 24x

x = 24

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1557 . Faruk can do a work in 12 days and Salam can do the same work in 8 days. If Faruk , Salam and Babu work together , they can complete the work in 4 days . How many days will it take Babu to complete the work alone ?

A. 16
B. 20
C. 24
D. 32
E. None of these

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Answer: Option C

Explanation:

in 1 day faruk can do 1/12 unit of work

in 1 day salma can do 1/8 unit of work

let asssume,

i 1 day babu can do 1/x unit of work

in 1 day babu , faruk and salma can do = (1/12 + 1/8 + 1/x) = 5x + 24/24x unit of work

given that, in 4 days they can complete 1 unit of work together

so in 1 day the can do 1/4 unit of work

hence , 5x + 24/24x = 1/4

20x + 96 = 24x

x = 24

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1558 . Father's age is 4 times his son's age now. 20 years from now son's age will be half of his father's age. What is difference in years of the present ages of father & son?

A. 30
B. 40
C. 20
D. 25

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Answer: Option A

Explanation:

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1559 . Father is aged 3times more than his son Ronit. After 8years, he would be two and a half times of Roni's age. After further 8years,how many times would he be of Ronit's age?

A. 2times
B. 2.5times
C. 3.5times
D. 3times

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Answer: Option A

Explanation:

ব্যাখাঃ ধরি, পুত্রের বয়স = ক বছর

পিতার বয়স = ক + ৩ক = ৪ক বছর

প্রশ্নমতে, ( ক + ৮) ২.৫ = ৪ক + ৮

বা, ২.৫ ক + ২০ = ৪ক + ৮

বা, ১.৫ ক = ১২

ক = ১২/১.৫ = ৮

৮ বছর পর পুত্রের বয়স = ৮ + ৮ = ১৬ বছর

৮ বছর পর পিতার বয়স = ( ৪×৮) + ৮ = ৪০ বছর

আবারও, ৮ বছর পরে পুত্রের বয়স = ১৬ + ৮ = ২৪ বছর

৮ বছর পর পিতার বয়স = ৪০ + ৮ = ৪৮ বছর

সুতরাং, পিতার বয়স পুত্রের বয়সের দ্বিগুন।

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1560 . Father is aged three times more that his son Ronit. After 8 years, he would be two and a half tims of Ronit's age. After further 8 years, how many times would he be of Ronit's age?

A. 2 times
B. 2.5 times
C. 2.75 times
D. 2.25 times

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Answer: Option A

Explanation:

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সমন্বিত পাঁচ ব্যাংক || অফিসার ক্যাশ - 06.11.2021

1546 . Employees of a discount appliance store receive an additional 20% off of the lowest price on an item. If an employee purchases a dishwasher during a 15% off sale, how much will he pay if the dishwasher originally cost $450?

1547 . Every 3 minutes, 4 liters of water are poured into a 2,000-liter tank. After 2 hours, what percent of the tank is full?

1548 . Every 3 minutes, 4 litres of water are poured into a 2,000 - litre tank , after 2 hours, what percent of the tank will be full?

1549 . Every sunday Akbar jogs 3 miles. For the rest of the week, each day he jogs 1 mile more than the previous day. How many miles does Akbar jog in 2 weeks?

1550 . Excluding stoppages, the speed of a bus is 54 kmph and including stoppages, it is 45 kmph. For how many minutes does the bus stop per hour?

1551 . Experts say that 25% of all serious bicycle accidents involve head injuries and of all such head injuries, 80% are fatal. What percentage of all serious bicycle accidents involve fatal head injuries?

1552 . f the length of each of the sides of three squeare garden's plots us increases by 50 percents, by what percent is the sum of the areas of the three plots increased?

1554 . Farhana deposited Tk.10000 in a bank at 13.25% interest rate compounded annually. At the end of the second year, the total amount including interest will become how much?

1555 . Faruk can complete a task in 20 days. He gets 2 assistants- each of whome can work as fast as he does. If all of them work together for 5 days, what percentage of the task will be complete?

1556 . Faruk can do a work in 12 days and Salam can do the same work in 8 days. If Faruk, Salam and Babu work together, they can complete the work in 4 days. How many days will it take Babu to complete the work alone?

1557 . Faruk can do a work in 12 days and Salam can do the same work in 8 days. If Faruk , Salam and Babu work together , they can complete the work in 4 days . How many days will it take Babu to complete the work alone ?

1558 . Father's age is 4 times his son's age now. 20 years from now son's age will be half of his father's age. What is difference in years of the present ages of father & son?

1559 . Father is aged 3times more than his son Ronit. After 8years, he would be two and a half times of Roni's age. After further 8years,how many times would he be of Ronit's age?

1560 . Father is aged three times more that his son Ronit. After 8 years, he would be two and a half tims of Ronit's age. After further 8 years, how many times would he be of Ronit's age?

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