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Boats Streams Formulas, Tricks with Examples - EduDose Formula: Speed in still water (km/hr)= (1 / 2) (a + b) Rate of stream (km/hr)= (1 / 2) (a - b) Where, a = Downstream (km/hr) b = Upstream speed (km/hr). Determine the speed of a motorboat Speed Of Boat In Still Water Formula Youtube in still water and the speed of the river current, if it takes 3 hrs to travel a distance of 45 miles upstream and 2 hrs to travel 50 miles downstream.: Let x = speed of boat in still water. Let y = speed of the current. Downstream. In water, the direction along the stream is called downstream. 2. Upstream. In water, the direction against the stream is called upstream. 3. Let the speed of a boat in still water be u km/hr and the speed of the stream be v km/hr, then. Speed downstream = (u + v) km/hr. Speed upstream = (u - .
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A unstayed ketch supply is accessible as well as easy to formula of speed of boat in still water a total thing can be set up in about 5 minutes. Crews of 4 rowers as well as the navigator price incoming swells sped the 14-foot lifeguard vessellift dual for fly fishing however three-4 simply rowing.

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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. Find the width of the river. Using i , we get. Using ii ,. Stream: It implies that the water in the river is moving or flowing. Upstream: Going against the flow of the river. Downstream: Going with the flow of the river. Still water: It implies that the speed of water is zero generally, in a lake.

Quicker Method to solve the Questions. Let the required distance be x km. Solution: Let the width of the river be x. Let a, b be the speeds of the ferries. The man rows to a particular place and comes back. You have to calculate the distance of this place. Let this distance be X. See the below diagram to understand clearly.

Man starts from A, travels to B and comes back. Therefore, above equation becomes,. Also we have calculated downstream and upstream speeds at the start see values 1 and 2. In question, you can see that the man takes 40 minutes to travel to B and come back to A. You have to convert this to hours and apply in above equation. We are converting from minutes to hours because we are using speed values in km per hour units. It takes him twice as long to row up as to row down the river.

Find the rate of the stream. Solution: Step 1: Calculate upstream and downstream speeds. Based on our assumptions, you can easily calculate upstream and downstream speeds as shown below. In this type, you have to form linear equations based on conditions given. You have to solve those equations to find the answer. Example Question 5: Kavin can row 10 km upstream and 20 km downstream in 6 hours.

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