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Study Guide: Boats And Stream
Source: https://www.fatskills.com/quantitative-aptitude-and-numerical-ability-for-competitive-examinations/chapter/boats-and-stream

Boats And Stream

By Fatskills Exam Guides Team — the exam nerds behind 28,500+ quizzes and 2.1M practice questions across 500+ global exams.

⏱️ ~1 min read
Some points to remember:
In water, the direction along the stream is called Downstream. And the direction against the stream is called Upstream.

A. If the speed of the boat in still water is x km/hr and the speed of the stream is y km/hr, then:
1 . Speed downstream = (x + y) km/hr
2. Speed upstream= (x - y) km/hr

B. If the speed downstream is a km/hr and the speed upstream is b km/hr, then:
1. Speed in still water = 1/2 (a + b) km/hr
2. Rate of the stream = 1/2 (a - b) km/hr

C. When the distance covered downstream and upstream are equal, we can write: (x + y)t1 = (x - y)t2 where t1 and t2 are different time taken.

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