Aptitude Boats and Streams Concepts and FormulasGeneral terms:1) Still water: The water of a river or any other water body which is not flowing is known as still water. 2) Stream: It is the flowing water of a river which is moving at a certain speed. 3) Upstream: The boat or a swimmer moving against the stream is known as moving upstream i.e. against the flow of water. 4) Downstream: The boat or a swimmer moving along the stream is known as moving downstream i.e. along the flow of water. Points to remember:1) If the speed of the boat or swimmer is X km/hr and the speed of the stream is Y km/hr, 2) Speed of man or boat in still water is given by; 3) Speed of the stream is given by; 4) A man can row at a speed of X km/hr in still water. If the speed of the stream is Y km/hr and the man rows the same distance up and down the stream, his average speed for the entire journey is given by; 5) A man can row a boat in still water at X km/hr. If the stream is flowing at Y km/hr it takes him t hours more to row upstream than to row downstream to cover the same distance. The distance is given by; 6) A man can swim in still water at X km/hr. If the stream is flowing at Y km/hr it takes him t hours to reach a place and return back to the starting point. The distance between the place and the starting point is given by; 7) A boat or swimmer covers a certain distance downstream in t1 hours and returns the same distance upstream in t2 hours. If the speed of the stream is Y km/hr, the speed of boat or man in still water is given by; 8) A boat or swimmer takes K times as long to move upstream as to move downstream to cover a certain distance. If the speed of the stream is Y km/hr, the speed of the boat or man in still water is given by; Aptitude Boats and Streams Test Paper 1 Aptitude Boats and Streams Test Paper 2 Aptitude Boats and Streams Test Paper 3 Aptitude Boats and Streams Test Paper 4
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