7351 . A train takes 20 seconds to cross a pole. It takes 50 seconds to cross the platform. What is the ratio of the length of the platform to that of the train?

A. 2 : 3
B. 2 : 5
C. 5 : 2
D. 3 : 2
E. None

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Answer: Option D

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সাধারণ বীমা কর্পোরেশন || সহকারী ব্যবস্থাপক (08-11-2024) || 2024

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7352 . A train takes 18 sec to pass completely through a station 162m long and 15 seconds through another station 120m long.The length of the train-

A. 70m
B. 80m
C. 90m
D. 100m

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Answer: Option C

Explanation:

Train length + 162m pass in 18 seconds

Train length + 120m pass in 15 seconds

( - ) So, 42 m passes in 3 seconds

In 3 seconds it passes 42 m

In 1 seconds it passes = 42/3 m = 14m

Now, in 15 seconds it passes = ( 14×15) m = 210m

Train length + 120m = 210m

Train length = ( 210 - 120)m = 90m.

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পল্লী কর্ম সহায়ক ফাউন্ডেশনের অ্যাসিসট্যান্ট ম্যানেজার-০৭.০৩.২০১৪

A. 400m
B. 600m
C. 200m
D. 800m

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Answer: Option C

Explanation:

Let L be the length of the train, and let P be the length of the pole. We're given that the train takes 10 seconds to cross the pole and 20 seconds to cross a platform of length 200 meters.

When the train crosses the pole, it covers its own length, so we can write:

L = 10 * Train's Speed

When the train crosses the platform, it covers its own length plus the length of the platform, which is 200 meters, so we can write:

L + 200 = 20 * Train's Speed

Now, we can solve this system of equations. First, isolate Train's Speed in the first equation:

Train's Speed = L / 10

Now, substitute this expression for Train's Speed into the second equation:

L + 200 = 20 * (L / 10)

Simplify:

L + 200 = 2L

Now, subtract L from both sides:

200 = L

So, the length of the train (L) is 200 meters. Therefore, the length of the train is 200 meters.

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সহকারী পরিচালক(AD) -12.11.2021

A. 25 sec
B. 35 sec
C. 38 sec
D. 40 sec

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Answer: Option C

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ওয়েজ আর্নার্স কল্যাণ বোর্ড || সহকারী পরিচালক (22-11-2024) || 2024

A. 78.4
B. 79.2
C. 64
D. 81.2

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Answer: Option B

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ঢাকা ইলেকট্রিক সাপ্লাই কোম্পানি ।। Assistant Engineer (20-05-2023)

A. 0.38160 rad or 18.13 °
B. 0.2816 rad ot 16.13 °
C. 0.2844 rad or 16.13 °
D. 0.2916 rad or 17.130 °

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Answer: Option B

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সিকিউরিটি প্রিন্টিং কর্পোরেশন বাংলাদেশ | সহকারী ব্যবস্থাপক- 26-11-2021

A. 20
B. 24
C. 25
D. 30

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Answer: Option D

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বাংলাদেশ তেল- গ্যাস ও খনিজসম্পদ কর্পোরেশন (পেট্রোবাংলা) || সহকারী ব্যবস্থাপক (22-11-2024) || 2024

A. 10%
B. 10.5%
C. 11%
D. 12.5%

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Answer: Option A

Explanation:

As per the ques,

10-x-(10×x)/100= -1(loss)

Or, x=10

So, he allowed a discount of 10%

(ans)

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বাখরাবাদ গ্যাস ফিল্ড লি. || সহকারী ব্যবস্থাপক/সহকারী কর্মকর্তা (16-10-2021)

A. 6
B. ৪
C. 12
D. 24

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Answer: Option C

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A. 50 liters
B. 100 liters
C. 150 liters
D. 200 liters
E. None

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Answer: Option B

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পায়রা বন্দর কর্তৃপক্ষ (বিভিন্ন পদ) 06-11-2020

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.

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BCSIC নিয়োগ পরীক্ষা - ২০১৮ পদ: এক্সটেনশন অফিসার তারিখ: ০৯-১১-২০১৮

7362 . A swimming pool is initially filled to a depth of 96 inches. After 2 weeks, the depth has decreased to $92 \frac{1}{2}$ inches. Assuming that the depth decreased at a constant rate, after how many days would the water depth have reached $93 \frac{3}{4}$ inches?

A. 3
B. 9
C. 7
D. 6

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Answer: Option B

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বাংলাদেশ পেট্রোলিয়াম ইনস্টিটিউট (সহকারী পরিচালক) 18-12-2020 || 2020

A. 3%
B. 4%
C. 5%
D. 6%

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Answer: Option D

Explanation:

Hints: Simple interest, I = Pnr (15500 - 12500) = 12500 × 4 × r r = 3/50 rate = 3/50 × 100% = 6 %

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C ইউনিট ব্যবসা শিক্ষা (২০২৩-২০২৪) || (09-03-2024) || চট্টগ্রাম বিশ্ববিদ্যালয়

A. Tk. 500
B. Tk. 1,500
C. Tk. 2,000
D. None of these

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Answer: Option C

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7365 . A sum of miney amounts to Tk 9800 after 5 years and Tk. 12005. after 8 years at the same rate of simple interest. The rate of interest per annum is.

A. 5%
B. 8%
C. 12%
D. 15%

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Answer: Option C

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প্রবাসী কল্যাণ ব্যাংক-সিনিয়র অফিসার-09-10-2021

7351 . A train takes 20 seconds to cross a pole. It takes 50 seconds to cross the platform. What is the ratio of the length of the platform to that of the train?

BdMerit-এর ১ বছরের প্রিমিয়াম প্যাকেজ কিনে ১০ মাস নিয়মিত প্রস্তুতি নিন—

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7352 . A train takes 18 sec to pass completely through a station 162m long and 15 seconds through another station 120m long.The length of the train-

7353 . A train takes 10 seconds to cross a pole and 20 seconds to cross a platform of length 200 m. What is the length of the train?

7355 . A train moves past a telegraph post and a bridge 264 m long in 8 seconds and 20 seconds respectively. What is the speed of the train?

7356 . A train is moving at the3 rate 8 mi/h along a piece of circular track of radius 2500 ft. Through what angle does it turn in 1 min?

7357 . A trader paid Tk. 300 for a shipment of x identical pens. The trader gave two pens free of cost and sold each for Tk. 5 more than the average cost of the x pens. If the total revenue from the sale of the pens was Tk. 120 more than the cost of the shipment, how many pens were in the shipment?

7358 . A trade marked the selling price of an article at 10% above the cost price. At the time of selling, he allows certain discount and suffers a loss of 1%. He allowed a discount of

7359 . A team of 2 men and 5 women completed one-fourth of a project in 3 days. After 3 days, one woman left and one man joined the team. The newly formed team took 2 days to complete another one-fourth of the project. How many days will it take to complete the project alone?

7360 . A tank that was 10% full was emptied into a 50-litre bucket.If the oil now fills 40% of the bucket’s volume. Then what is half of the capacity of the tank in liters?

7361 . a tank 40% is full of water ,if 9 liters water is removed the tank become 1/4 full what is the capacity of tank of watera/

7363 . A sum of Tk. 12,500 amounts to Tk. 15,500 in 4 years at the rate of simple interest. What is the rate of interest?

7364 . A sum of money is to be distributed among A, B, C and D in the proportion of 5: 2:43. If C gets Tk. 1,000 more than D, what is B's share?

7365 . A sum of miney amounts to Tk 9800 after 5 years and Tk. 12005. after 8 years at the same rate of simple interest. The rate of interest per annum is.

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