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Upstream/downstream with respect to remotes is, the downstream repo will be pulling from the upstream repo (changes will flow downstream naturally). Upstream/downstream with respect to time/history can be confusing, because upstream in time means downstream in history, and vice-versa (genealogy terminology works much better here - parent/ancestor/child/descendant). � charlesreid1 Jul 18 '15 at 6.� One important aspect of git is it is distributed, and being distributed largely means there is no inherent "upstream" or "downstream" in the system., that simply means there is no absolute upstream repo or downstream repo. Those notions are always relative between two repos and depends on the way data flows. Mathematics Stack Exchange is a question Upstream And Downstream In Maths Quote and answer site for people studying math at any level and professionals in related fields. It only takes a minute to sign up. Sign Upstream And Downstream In Maths Reading up to join this community.� I am a bit confused here, does it pertain to ADDING time? as the boat goes downstream? downstream supposed to be faster so how can it add time? Does it pertain to multiplying $\frac{2}{3}$ to Upstream And Downstream Meaning In Maths In English downstream or upstream? Any hint? algebra-precalculus. "Upstream" and "downstream" are business terms applicable to the production processes that exist within several industries. Industries that commonly use this terminology include the metals industry, oil, gas� In contrast, the downstream production process involves processing the materials collected during the upstream stage into a finished product. The downstream stage further includes the actual sale of that product to other businesses, governments or private individuals. The type of end user will vary depending on the finished product. Regardless of the industry involved, the downstream process has direct contact with customers through the finished product.

Dear Reader, problems under boats and streams are not only easy to solve but interesting as well. 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 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,. 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.

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. Ready for short practice test? Start Test Here. You can type your doubts in the comments section below. You can also suggest improvements to the above tutorial. Homepage Tutorials. Tags: Boats and Streams Problems.

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