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Mar 25, �� Basic formulas of Boats and Streams Suppose, the speed of a stream of a flowing river is x km/hr and the speed of a boat in still water is y km/hr, then Downstream Speed = (x + y) km/hr. So, If the boat is floating in the water with the stream then the speed of the boat will be � Sum of downstream speed and boat speed. Jan 12, �� Basic Formulas of Boats and Streams 1 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. Solution: Let speed of boat in still water is b km/hr and speed of stream is s km/hr. Then b + s = d and b � s = u. Solving the 2 equations we get, b = (d + u)/2. s = (d � u)/2. 2) A man can row a boat, certain distance downstream in td hours and returns the same distance upstream in tu hours. This is the aptitude questions and answers section on "Boats and Streams Important Formulas" with explanation for various interview, competitive examination and entrance Aptitude Related To Boats And Streams Queue test. Solved examples with detailed answer description, explanation are given and it would be easy to understand.� Downstream/Upstream: 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. Boats and streams is one of the most common topics in quantitative section of all the job entrance myboat343 boatplans is also included in Aptitude section of many job test in companies like TCS, Infosys etc. This a very simple topic and require to direct application of Formulas to solve the question. Formulas for Boats and Streams Questions with Basic Concepts. 1. What is Downstream: It is related to the direction of water flow in respect with the object, when the object or body is flowing in direction of stream it is called as Downstream.� Below are the best formulas for boats and Streams problems in seconds. Basic Formulas for Upstream and Downstream. Basic Formulas of Boats and Streams 1. Basic Formulas on Boats and Streams 2. Additional Formulas of Boats and Streams 1. Derivation of formula 8 (boats and streams). Let the speed of a man in still water = $x$ km/hr speed of the stream = $y$ km/hr. Assume he travels a distance $d$ km upstream and come back the same distance downstream, and total time taken = $t$ hours. Speed downstream $=(x+y)$ Speed upstream $=(x-y)$. Time taken to travel upstream $=\dfrac{d}{x-y}$ Time taken to travel downstream $=\dfrac{d}{x+y}$. Total time $=t$ $\dfrac{d}{x-y}+\dfrac{d}{x+y}=t\\ d(x+y)+d(x-y)=t(x+y)(x-y)\\ 2dx=t(x+y)(x-y)\\ 2dx=t(x^2-y^2)\\ d=\dfrac{t(x^2-y^2). }{2x}$.
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