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What is Upstream and Downstream in Software Development? ? 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. You should remember these boats and streams formulas. Must Read Boat and Streams Articles. = ? (Downstream Speed � Upstream Speed) Types of Questions asked in the Previous Exams By SSC Type 1: When the distance covered by boat in downstream is same as the distance covered by boat upstream. The speed of boat in still water is x and speed of stream is y then ratio of time taken in going upstream and downstream is. Sep 13, �� Downstream speed D = (B + S) km/hr If in the question, you are provided with the upstream and the downstream speed U and D respectively, to determine the speed of boat and stream the formula goes like Speed of boat B = (D + U) / 2 Speed of stream S = (D - U) / 2.
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A professional swimmer challenged himself to cross a small river and back. If it took him 15 mins more to cover the distance upstream than downstream, then find the width of the river?

Find the average speed of a boat in a round trip between two places 18 km apart. Attempt subject wise questions in our new practise section' Click here. Download Gradeup , the best government exam app for Preparation. Umesh Kumar Jan 22, Shruti Kulkarni Jun 19, Saurabh Ghanghoriya Aug 11, Saumya Sen Aug 13, Devendra Singh Aug 13, Nirmal Rai Dec 28, Prashant Kumar Yadav Jan 1, Kaptan Jan 6, Janardan Jan 28, Parnab Mallick Read in Hindi.

Share via. 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. Hey I am Ramandeep Singh. Do you want me to help you? Login Sign Up. Formula 1: If the ratio of downstream and upstream speeds is D: U, then ratio of time taken will be U : D. Question: A boat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream.

What is the ratio between the speed of the boat and speed of the water current respectively? Solution: When 8 hours 48 minutes is written using mixed fractions,.

Therefore, the ratio of the time taken becomes Which on solving gives, Now, as the ratio of time is inversely proportional to that of Upstream and Downstream speeds. Now, the ratio of speed of boat and the speed of stream will be. How far is the place?

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