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If a boat goes 7 km upstream in 42 minutes and the speed of the speed of the stream is 3 kmph, the speed of the boat in still water is

If a boat goes 7 km upstream in 42 minutes and the speed of the speed of the stream is 3 kmph, the speed of the boat in still water is Correct Answer 13 km/hr

প্রদত্ত অপশনগুলোর মধ্যে শুধুমাত্র (c) অপশনটি underlined অংশে বসালে পুরো বাক্যটি অর্থবোধক হয়। ‘In the form of carbon dioxide’ - এই শব্দগুচ্ছটি অবশ্যই carbon– কে modify করবে, fungi - কে নয়। তাই শব্দগুচ্ছটি carbon–এর কাছে বসবে।

Related Questions

What is the distance covered by boat N upstream in 5 hours? Which of the following option is sufficient alone to find the answer? A) Boat M is travelling downstream with 20% more downstream speed of boat N. Speed of boat M in still water is 10% more than the speed of boat N in still water. B) Boat M and Boat N are travelling downstream with speed 33 km/hr and 40 km/hr respectively and speed of boat M is still water is 2 times the speed of stream. C) Speed of boat M in still water is 6 km/hr less then speed of boat N in still water and speed of stream is 10 km/hr. D) Speed of stream is ½ times the speed of boat N in still water and downstream speed of boat M is 44 km/hr. E) Speed of stream is 10 km/hr and ratio of upstream speed of boat M and boat N is 3 : 2 respectively.
In the following question, two statements are numbered as A and B. On solving these statements we get quantities A and B respectively. Solve for the both quantities and chose the correct option. Quantity A: The ratio of speed of boat to speed of stream is 2 : 1, If the boat travels 162 km and come back to starting point in 36 hour. What is the difference between the time taken by the boat to go upstream and the time taken by the boat to go downstream? Quantity B: The speed of the stream is 6 km/hr and the distance travelled by the boat is 60 km. If the boat covered half distance upstream with usual speed and other half with double its speed, then it takes 7.5 hours less time than usual time to go upstream. Find the total time taken by the boat to go upstream and downstream?
Study the following questions carefully and answer accordingly. Quantity - I) If the time taken by a boat to cover the same distance in upstream is 2 hours more than downstream. The downstream speed of the boat and the speed of current is 16 kmph and 4 kmph then find the total distance travelled by the boat? Quantity - II) If the time taken by the boat in upstream and in downstream is 16 hours and 10 hours to cover the same distance. Then find the speed of boat in still water is how much percent of the speed of stream? Quantity – III) If the length of rectangle is twice of its breadth and 3 times more than the side of square and the difference between the side of square and length of rectangle is 15 cm then find the area of rectangle ?
A boat goes to 36 km downstream with the speed of the boat in still water 15 km/hr in still water and it goes to 28 km in upstream with the speed of 3/5 of the speed of the boat in still water. How much time was taken by the boat to cover the total distance, if the speed of the stream is 3 km/hr?
The following questions have three statements. Study the question and the statements and decide which of the statement(s) is/are necessary to answer the question. Find the speed of the boat in still water. Statement I: The boat goes twice the distance downstream as it goes upstream in 30 minutes. Statement II: The boat goes 720 meters in 1 hour downstream. Statement III: Speed of the boat in still water is three times the speed of the current.
In the following question, three statements are given. You have to find which is/are necessary and sufficient to answer the following question. Find the speed of the boat in still water. Statement I: The boat goes twice the distance downstream in the same time, as it goes upstream. Statement II: Speed of the boat in still water is three times the speed of the current. Statement III: The boat goes 840 meters in 1 hour 10 minutes downstream.
In a stream, the ratio of the speed of the boat in still water and the speed of the stream is 7 : 5. The ratio of the speed of another boat in still water to the speed of the stream is 4 : 3. What is the ratio of the speed of the second boat to that of the first boat in still water?
The following question, there are three statements I, II and III. Read the question carefully and mark your answer according to which statements(s) is/are sufficient to the answer the question. Find the distance after which the speed of the of the stream changes. Statement I: A man rowing a boat in downstream and the speed of the boat in still water is four times the speed of the stream. Statement II: The speed of the stream is 2 kmph which is increased by 2 kmph after travelling some distance thereby reaching the destination earlier by 5 minutes. Statement III: Total distance covered by the boat is 25 km in downstream.
In a river, the ratio of the speed of stream and speed of the boat in still water is 4 : 7. Again, the ratio of the speed of the stream and speed of another boat in still water is 2 : 5. What is the ratio of the speed of the first boat to the second boat in still water?
A man rows a boat and takes 120 minutes when he goes 17 km upstream and 27 km downstream. In another round, he goes 51 km upstream and 36 km downstream in total time of 270 minutes. What is the speed of the boat in still water and the speed of stream?