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This page provides important Boats and Streams Formulas, Tips, and Tricks using which you can solve questions asked in competitive and entrance exams easily.� In other words, the direction along the river current is called downstream. If the speed of motorboat in still water is x km/hr and the speed of stream is y km/hr then Downstream Speed = (x + y) km/hr. In the question, you will be given downstream speed and upstream speed and asked for speed of a boat in still water and the speed of the current. In that case, use the below formula to get the answer- Let downstream speed is a km/hr and upstream speed is b km/hr then, Speed of boat in still water. a + b 2. Speed of stream. a - b 2. Trick 1 The speed of a boat in still water is x km/hr. The speed of a boat in still water is v. The boat is to make a round trip in a river whose current travels at speed u. Derive a formula for the time needed t � in this problem on two dimensional kind of medics were told that a boat has a speed V in Stillwater and the boat is required to make a round trip in a river whose current has been you. We want to derive a formula for the time it will take for the or to make a round trip, profiting off distance D if it makes the trip upstream and then back downstream as well as directly directly across the river and back. So firstly, well, part A. Let's look at the upstream trip. Now upstream, the board will cover a distance of the over to on a net speed off the minus you. So the time it will take t one to. A motorboat spends \$1\$ hour and \$50\$ minutes sailing downstream the river for \$20\$ km and sailed back upstream the myboat330 boatplans time it spends \$54\$ minutes sailing \$12\$ km downstream the river and 8 km upstream the myboat330 boatplansate the speed of the boat in still water and the speed of the current of the river. word-problem. Share. Cite. Follow. edited Feb 13 '17 at user

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 Still Water Formula Python 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.