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Speed of Boat in Still Water Calculator Jun 12, �� Downstream = (u+v)Km/hr, where �u� is the speed of the boat in still water and �v� is the speed of the stream Speed of Boat in Still Water = ? (Downstream Speed + Upstream Speed) Speed of Stream = ? (Downstream Speed � Upstream Speed). the current in a river moves at 2mph. a boat travels 18 miles upstream. and 7 miles down stream in a total 7 hours. what the speed of the boat in still water? ; Let s = speed of the boat in still water. then. (s+2) = speed downstream. and. (s-2) = speed upstream. 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) Related Calculator.
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In this tutorial, you will see 5 important types of problems. At the end of the tutorial, you will find short online practice test. Let us begin the tutorial now. In this type, you will be finding speed of boat in still water i. You have to remember a very simple formula as shown below. Find the speed of the boat in still water. Solution: From the question, you can write down the below values.

You have to substitute the above values in the below formula. This type is similar to type 1. But there is one difference. Here you have to find speed of stream and not the speed of the boat. You have to use the below formula to find speed of stream. Example Question 2: A man rows downstream 30 km and upstream 12 km.

If he takes 4 hours to cover each distance, then the velocity of the current is:. Solution: In this question, downstream and upstream speeds are not given directly. Hence you have to calculate them first. Step 3: Calculation of speed of stream You have to substitute values got in steps 1 and 2 in below formula to find the speed of the stream. In this type, you have to find distance of places based on given conditions.

Below example will help you to understand better. If in a river running at 2 km Speed Of The Boat In Still Water Formula Sum an hour, it takes him 40 minutes to row to a place and return back, how far off is the place? 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,. Find the speed of the boat and the river. Solution: Downstream speed is ,. Speed of current Downstream�Upstream speed. When the river is running at 1.

How far is the place? A man rows a certain distance downstream in X hours and returns the same distance in Y hours. Example 5: Vikas can row a certain distance downstream in 6 hours and return the same distance in 9 hours. Example 6: Two ferries start at the same time from opposite sides of a river, travelling across the water on routes at right angles to the shores.

Each boat travels at a constant speed though their speeds are different. They pass each other at a point m from the nearer shore. Both boats remain at their sides for 10 minutes before starting back. On the return trip they meet at m from the other shore.

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.

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