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Worst, Average and Best Cases.� Write a program to find the speed of boat upstream and downstream. In order to calculate the speed of the boat upstream and downstream, we should know the speed of the boat in still water(B) and speed of the stream (S). Examples: Input: B = 10, S = 4 Output: Speed Downstream = 14 km/hr.� The speed of boat upstream is equal to the difference of the speed of the boat in still water and speed of the myboat350 boatplans: Speed Downstream = B + S km/hr Speed Upstream = B Average Speed Of Boat In Upstream And Downstream Group � S km/hr. C++. // CPP program to find upstream and. // downstream speeds of a boat. #include. using namespace std; // Function to calculate the. // speed of boat downstream. int Downstream(int b, int s). { return (b + s). Speed of boat against the stream = (A � B) km/hr. Speed of boat in still water is: Speed of the stream or current is: Quicker Method to solve the Questions. Boat�s speed in still water. = Example 1: A boat travels equal distance upstream and downstream. The upstream speed of boat was 10 km/hr, whereas the downstream speed is 20 km/hr. What is the speed of the boat in still water? Solution: Upstream speed = 10 km/hr. Downstream speed = 20 km/hr. As per formula, Boat�s speed in still water. = Therefore, Boat�s speed in still water. = = Speed of current. = Example 2: A boat travels equal dist. downstream speed of boat = sdownstream = v + c. Upstream data: d = 70 miles, t = hours. supstream = 70 miles/ hours = 70/ (miles/hr) = miles/hr. Downstream data: d = 70 miles, t = Average Speed Of Boat In Upstream And Downstream Update 5 hours. sdownstream = 70 miles/5 hours = 10/5 (miles/hr) = 14 miles/hr. a). With this, we arrive at the following equations for the upstream and downstream speeds of the boat: supstream: v - c = sdownstream: v + c = b). To solve for the speed of the current (c), first solve each equation for the speed of the boat in still water (v) in terms of c. Then we can set these to expressions equal.

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 Average Speed Of Boat In Upstream And Downstream Use 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 of the boat in still water be x kmph.

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