What is upstream and downstream in maths?

Asked by: Nate Newsome

Upstream = (u−v) km/hr, where “u” is the speed of the boat in still water and “v” is the speed of the stream. Downstream = (u+v)Km/hr, where “u” is the speed of the boat in still water and “v” is the speed of the stream.

What is the formula of upstream and downstream?

Let ‘u’ be the speed of the boat downstream and ‘v’ be the speed of the boat upstream. Consider the following formula 1/2 [Downstream speed + Upstream speed]. Therefore, 1/2 [u+ v] = speed of the boat in still water.

What is the downstream and upstream?

Simply put, upstream works include the exploration and production of crude oil and natural gas, whilst downstream refers to the processes applied after extraction through to it being delivered to the customer in whatever format required.

What is upstream math?

In water, the direction along the stream is called downstream. And, the direction against the stream is called upstream. If the speed of a boat in still water is u km/hr and the speed of the stream is v km/hr, then: Speed downstream = (u + v) km/hr. Speed upstream = (u – v) km/hr.

What is the formula for upstream?

From the basic formula for the speed we have, speed = Distance/Time or in other words we can say that Time = Distance/speed. We have the Distance for the journey = 81 km. Now we have to find the speed of the boat upstream. The upstream speed is = b – r = 13 – 4 = 9 km /hr.

What is upstream and downstream example?

Another Example – Personal Computers



As noted, upstream and downstream operations exist wherever there is a supply chain that begins with basic materials and ends with finished goods for sale. Therefore, another example of upstream to downstream can be the personal computer industry.

What is the difference between upstream and downstream flow?

Upstream means that the object is going opposite to the flow of the river. In this case you have to subtract the speed of the given object in still water from the speed of flow of the stream. Downstream means that the object is flowing along the river and in this case you have to add the speed.

What is upstream area?

Definition: A drainage area is the total surface area, upstream of a point on a stream, where the water from rain, snowmelt, or irrigation which is not absorbed into the ground flows over the ground surface, back into streams, to finally reach that point. Source: GreenFacts.

Is downstream and still water same?

Upstream- When the boat is flowing in the opposite direction of the stream, it is called Upstream. Downstream- When the boat is flowing in the same direction as the stream, it is called Downstream. Still Water– When the water is stationary i.e. not flowing then the speed of water is zero.

How do you solve a boat and stream question?

Adding the two equations, we get 2b = d + u. ⇒ b = (d+u) / 2 which gives the speed of the boat in terms of downstream and upstream speed. Subtracting the equation (i) and (ii), we get d – u = 2w ⇒ w = (d-u) / 2 which gives the speed of the stream in terms of downstream and upstream speed.

How do you solve upstream and downstream questions?

Upstream and Downstream – Formula

1. Upstream = (u−v) km/hr, where “u” is the speed of the boat in still water and “v” is the speed of the stream.
2. Downstream = (u+v)Km/hr, where “u” is the speed of the boat in still water and “v” is the speed of the stream.
3. Speed of Boat in Still Water = ½ (Downstream Speed + Upstream Speed)

What is upstream and downstream in aptitude?

The speed of the boat or swimmer in the direction of the stream is known as speed downstream. It is given by; Speed downstream= (X+Y) km/hr. And, the speed of the boat or swimmer against the stream is known as speed upstream.

How do you find average speed of upstream and downstream?

This can be done as follows, Upstream speed = distance covered in 1 hour 15 minutes / Time taken to travel 50 miles = 50/⁵/₄ = 40 miles/hr. Boat’s speed in still water = ½ (Upstream speed + downstream speed) = ½ (40 + 60) = 50 miles/ hr. Now we are in stage of using the average speed formula.

How do you calculate stream speed?

Important Formulas – Boats and Streams

1. Downstream. In water, the direction along the stream is called downstream.
2. Upstream. In water, the direction against the stream is called upstream. 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.

What is the formula of time and work?

Important Time and Work Formula



Work Done = Time Taken × Rate of Work. Rate of Work = 1 / Time Taken. Time Taken = 1 / Rate of Work. If a piece of work is done in x number of days, then the work done in one day = 1/x.

How do you calculate current speed?

Answer

1. The distance going upstream and downstream is the same.
2. Time going upstream is 3 hours.
3. Time going downstream is 2 hours.
4. Speed of the boat (r) is 5 miles per hour.
5. Distance (d) = rate (r) X time (t)

How is downstream distance calculated?

And symmetric property rewrite to get near the standard form or you can just switch the sides. And move the fractions in front and then solve. Then multiply both sides by the reciprocal.

How do we calculate distance?

To solve for distance use the formula for distance d = st, or distance equals speed times time. Rate and speed are similar since they both represent some distance per unit time like miles per hour or kilometers per hour. If rate r is the same as speed s, r = s = d/t.

How do you count time?

Calculate the duration between two times



First, identify the starting and an ending time. The goal is to subtract the starting time from the ending time under the correct conditions. If the times are not already in 24-hour time, convert them to 24-hour time. AM hours are the same in both 12-hour and 24-hour time.

How many hours is 9AM to 5PM?

and you are on a 9AM to 5PM job, then the question is how many hours is 9 to 5. The answer is exactly eight hours.

How many seconds we have in a day?

How to Calculate Seconds Back and Forth

How can I add time in Excel?

HOW TO ADD TIME IN EXCEL

1. Step 1: Enter your hours and minutes in a hh:mm format in the column cells.
2. Step 2: Change the Format of your total cell to: [h]: mm.
3. Step 3: In your Total cell enter the Excel formula ” =SUM( ” and then select the cells with the hours in it.
4. Step 4: Click Enter.

How do I subtract military time in Excel?

1. Apply Subtraction for Subtracting Military Time in Excel

1. First, select cell E5 to subtract military time.
2. Further, autoFill the subtract formula to the entire column, and you will get the output of the subtract formula that has been given in the below screenshot.

How do you subtract in Excel?

Subtracting Cells/Values in Excel

1. Select the cell where you want to subtract and enter an equal to sign (=)
2. Enter the first value.
3. Enter the subtraction sign (minus sign -)
4. Enter the second number.
5. Hit Enter.