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Lesson Selected problems from the archive on the boat floating Upstream Upstream And Downstream Boat Problems and Downstream A man rows downstream by covering a certain distance in p1 hours and returns the same distance upstream in p2 hours. If the speed of the stream is s km/hr, then the speed of the man in still water will be: A man takes same number of times say m times to row upstream as to row downstream a river. A boat is said to Boat Travel Upstream And Downstream Problems List go downstream if it goes in the direction of stream and then its speed= x+y. A boat is said to go upstream if it goes opposite to direction of stream& then its speed= x-y. No need to remember formulas, just try to visualise the given situation and solve resulting equations. K views. Nov 12, �� Going DOWNSTREAM, the current will move the boat along faster than it would travel in still water. The rate of the boat going downstream will be r + 7 mph. The time it takes to go miles downstream is / (r + 7). myboat334 boatplans problem says that the two times are the same: time to travel miles upstream = time to travel miles downstream.
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What was the average speed during the whole journey? Sol In this problem we cannot directly use the formula first we need to find the upstream speed and speed Boat Travel Upstream And Downstream Problems In Pdf in still water. This can be done as follows,. Example 5: A person challenged himself to cross a small river and back. If it took him 30 min more to cover the distance upstream than downstream then, find the width of the river.

If a boat takes t hours to row to a place and return back, then the distance between the two places can be estimated through. If in a river running at 1. Sol To solve this question we will simply use the formula given above. In this case, t is 50 minutes b is 1. The above examples are just few simple and basic application of the methods stated along with them.

These formulas can come in handy and can save lot of your time in exam. You can find questions and problems involving simultaneous use of more than one formula at times. But if you know the correct utilization of them you can solve any problem easily. And, this smoothness comes with practice so the more you varied questions you try the more you will learn and become better at solving them.

So, keep practicing! Enroll Now Rs. Your email address will not be published. This site uses Akismet to reduce spam. Learn how your comment data is processed. Downstream : It means moving along in the direction of the flow of the stream. There can also be other questions in calculation of time and some of them can be easily be solved using the formulas given below.

Let d the distance. Sol This question requires direct use of the formula mentioned earlier. 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 Boat Upstream And Downstream Problems For Pdf 6 hours. Also, he can row 20 km upstream and 15 km downstream in 9 hours. Find the rate of the current and the speed of the man in still water. Solution: You have to make below assumptions to form equations.

You already know the below equation. If you are not clear about this, refer to the equation in type 3. Note: To solve such linear equations, there is another simple shortcut. Here is the video link to that shortcut. From the values of u and v, you can find the downstream and upstream speeds as shown below. Also, you know the formula for speed of the current.

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