A man rowing in favor of the current can go 96 km in 12 hours and he can go the same distance in 48 hours against the current . What is the speed of the current per hour?

Shohan

5 views

2025-01-04 04:42

1 Answers

Shohan

প্রশ্নে বলা হচ্ছে যে, এক ব্যক্তি স্রোতের অনুকূলে নৌকা চালিয়ে 12 ঘণ্টায় 96 km যায়। আবার স্রোতের প্রতিকূলে একই দূরত্ব অতিক্রম করতে 48 ঘণ্টা সময় লাগে। স্রোতের বেগ ঘণ্টায় কত?

ধরি, নৌকার বেগ ঘণ্টায় x km

এবং স্রোতের বেগ ঘণ্টায় y km

অতএব, স্রোতের অনুকূলে নৌকার বেগ $= \frac{96}{12} = 8 k p h$ এবং স্রোতের প্রতিকূলে নৌকার বেগ $\frac{96}{48} = 2 k p h$

$\frac{x + y = 8 x - y = 2}{(-) 2 y = 6}$

∴ y = 3

∴ স্রোতের গতিবেগ 3kph

5 views Answered 2024-12-14 13:31

Related Questions

Write a precis of the following passage with a suitable title:Most men long for wealth, Wealth, they think, brings happiness. But often, wealth brings a deal of worry without much happiness. A millionaire is a very wealthy man, of course, but his great wealth is also a great responsibility. He may have many large estates and factories. Estates and factories usually need a lot of attention. There may be disputes between the millionaire and his workers over one trouble or another. These disputes may lead to strikes and conflicts, for which the millionaire may lose a lot of money. Or some gangster may kidnap the millionaire's child and demand a huge ransom for the safe return of the child. A very rich man, therefore, in spite of his great wealth, may not have an easy life. He has many worries. These worries may be greater than the worries of a poor man.

1 Answers 14 Views

A man has to go 10 km to catch a bus. He walks part of the way at 7km/per hour and runs rest of the way at 12 km/per hour. If he takes 1 hour 15 minutes to complete his journey, find how far he waked.

1 Answers 12 Views

A man’s running speed is 3 times of his walking speed. He runs a distance and comes back by walking . Total time taken by him is 2 hours. What is the distance in miles if he runs 9 miles per hour? (speed)

1 Answers 5 Views

Rashed is driving at a speed of 120 km per hour Mahi started one hour late and started driving at a speed of 140 km per hour. How long will it take for Mahi to catch up Rashed? (work & time)

1 Answers 12 Views

A boat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and the speed of the water current respectively? (Boat & stream)

1 Answers 7 Views

A train 400 meter long overtook a man walking along the line in the same direction at a speed of 5 km/hr and passed him in 40 seconds. The train reached the station in 20 minutes after it had passed the man. In what time did the man reach the station?

1 Answers 12 Views

The speed of the boat in still water is 24 kmph and the speed of the stream is 4 km/hr. The time taken by the boat to travel from A to B downstream is 36 minutes less than the time taken by the same boat to travel from B to C upstream. If the distance between A and B is 4km more than the distance between B and C, what is the distance between A and B?

1 Answers 6 Views

A river is flowing at a speed of 5 km/h in a particular direction. A man, who can swim at a speed of 20 km/h in still water, starts swimming along the direction of flow of the river from point A and reaches another point B which is at a distance of 30 km from the starting point A. On reaching point B, the man turns back and starts swimming against the direction of flow of the river and stops after reaching point A. The total time taken by the man to complete his journey is?

1 Answers 4 Views

Jane covered a distance of 340 miles between city A and city B taking a total of 5 hours. If part of the distance was covered at 60 miles per hour speed and the rest at 80 miles per hour speed, how many hours did the travel at 60 miles per hour? (Speed & Distance)

1 Answers 5 Views

The prevalence of teenage employment in Bangladesh is controversial. Questions have been raised regarding whether adolescents should work and if they do, what the terms and conditions will be. It is argued that work experience can promote the healthy development of adolescents when it is moderate in intensity and does not interfere with physical and mental growth. According to Bangladesh Labour Act 2006, an adolescent is defined as a person above the age of 14 but below 18. According to the law, before the appointment of a job, ascertainment of the age, birth, school, or registered physician's certificate regarding the age of the adolescent shall be used. After the appointment, some other conditions shall have to be followed regarding working hours, hazardous works, etc. Adolescents shall not be required to work between 7 pm to 7a.m and the working hours shall not be more then 5 hours in a day and 32 hours in a week. In addition, adolescents shouldn't clean, lubricate of adjust any part of machinery in motion. Further, the employment of adolescents on dangerous machines without full instruction, precaution, and sufficient training, is prohibited. However, the proper implementation of existing regulations is questionable. For the smooth physical and mental development of adolescents, the authorities should implement the laws strictly to build up a healthy and prosperous generation. (Prepare a precis of the following text)

1 Answers 8 Views

এক্সাম দিয়ে মেধা যাচাই করুন

Job Preparation (1125)

Admission (754)

এসএসসি (10)

এইচএসসি (5)