How Fast Are Yachts? Top Speed For 3 Types (With 10 Examples)
Boats and Stream. A man rows 6 km/h in still water. If the river is running at 3km/h, it takes him 45 minutes to row to a place and back? How far is the place? 1) 27/15 km 2) 25/16 km 3) 27/16 km 4) 35/16 km 5) None of these. Answer & Explanation. Answer � 3) 27/16 km Explanation: A boat goes 40 km upstream in 8 hours and a distance of 49 km downstream in 7 hours.� If ratio of speed of boat in upstream to the downstream is 3: 7 and time taken to cover (D+18) km downstream is hours what will be the speed of current? 1) km/h 2) 6 km/h 3) 8 km/h 4) km/h 5) None of these. Answer & Explanation.� If the river is running at 1km/h, it takes him 75 minutes to row to a place and back. How far is the place? 1) km 2) 4 km 3) km 4) 3 km 5) None of these. "The boat in Figure is heading due north a it crosses a wide river with a velocity of km/h relative to the water. The river has a uniform velocity of km/h due east. Determine the velocity of the boat with respect to an observer on the riverbank." m/s. Glossary. Manhattan Island Foundation.� "Speed also varies along the stream channel, being fastest where the channel is narrowest and the gradient steepest, and it changes with time, being fastest at flood stage. Speed probably varies from about 3 ? to 7 miles per hour." to m/s. Dunn, Jimmy, The Nile River, Tour Egypt, June 5, "The Nile flowed from south to north at an average speed of about four knots during inundation season." m/s. The speed of a river varies from close to 0 m/s to m/s (7 mph). You can't just miss out watching this video if you are a class X students preparing for board exam..I have discussed 4 very-very important problems based.

Boats and Streams is an essential topic for many competitive exams. Many varieties of questions can be framed from this area. We use the fundamental concepts of time speed and distance only to solve elementary questions on Boats and Streams.

However, some types of questions are tricky and take lots of time to solve by applying textbook approach. Fortunately, there are some shortcut formulas available to handle such problems. In this article, besides an understanding of the basic concepts of boat sand streams, we will also learn few tricks to solve some exceptional questions. Some shortcut formulas related to the speed of boats and streams is handy as we require them frequently. Below are the lists of the formulas:.

Question 1: A boat is rowed down a river 28 km in 4 hours and up a river 12 km in 6 hours. Find the speed of the boat and the river. Question 2: A man rows 18 km down a river in 4 hours with the stream and returns in 12 hours.

Find his speed and also the speed of the stream. Question The speed of the boat in the still water is 6 kpmh, and the speed of the stream is 2 kmph. The boat goes a certain distance down the stream and comes back upstream to the same place from where it started. Find the average speed of the boat in the entire journey. Average Speed. Important: If the boat takes t down and t up respectively to travel same downstream and upstream distance, then we the following relation:.

Question 4: A boat takes 6 hours to go downstream and comes back upstream in 12 hours. Find the ratio of the speed of the boat and the speed of the stream. Question 5: A man rows 10 km upstream and back again to the starting point in 55 min.

If the speed of the stream is 2 kmph, then find the speed of the boat in still water. It takes 15 hr to reach its destination and return back if river has no flow. For the same journey it takes 16 hr if river is flowing. Find speed of flow of river. Your email address will not be published. Skip to content Boats and Streams is an essential topic for many competitive exams. Boats and Streams � Terminologies: Stream: It implies that the water in the river is moving or flowing.

Standard Method: Let one side the distance be d km. Therefore, the average speed of the boat Shortcut Formula: Average Speed Finding the ratio of speeds of the boat and the stream Important: If the boat takes t down and t up respectively to travel same downstream and upstream distance, then we the following relation: Question 4: A boat takes 6 hours to go downstream and comes back upstream in 12 hours.

Standard Method: Let the common distance be d km. Finding the total time of the journey. Shortcut Formula: Let the speed Boat And Stream Practice Questions 50 of the boat in still water be x kmph. Leave a Comment Cancel Reply Your email address will not be published. Join Now.

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