281 viewsBoat and Stream
Boat and stream are an important section of mathematics subject from various competitive examinations, which we can understand by the adaptive and counter current of the stream. Effortless flow of current: - If a boat or man moves along the stream i.e. in the direction of the stream, then its speed is said to be in the flow of the stream. Direct flow of the stream: - If a boat or man moves in the opposite direction of the stream, then its speed is said to be opposite the current. Explain that the questions related to boat and stream can be solved only by understanding the formulas like speed of boat = (speed in the direction of the stream + speed in the opposite direction) / 2 or speed of the stream = (speed in the direction of the stream - The opposite move of the stream) / 2. If you are also preparing for any competitive exam, then the important questions based on the boat and stream provided here will help you a lot in your exam preparation.
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If a boat goes upstream at a speed of 24 km/hr and comes back the same distance at 40 km/hr. What is the average speed (in km/hr) for the total journey?
3 0 5f2a7064a5ce9779bd292e5a- 132false
- 230true
- 331false
- 433false
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Answer : 2. "30"
A man rows to a place 35 km in distance and back in 10 hours 30 minutes. He found that he can row 5 km with the stream in the same time as he can row 4 km against the stream. Find the rate of flow of the stream?
181 0 5f23edc41436461f6a2f678f- 11.33 km/hrfalse
- 21.5 km/hrfalse
- 31 km/hrfalse
- 40.75 km/hrtrue
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Answer : 4. "0.75 km/hr"
If the speed of a boat in still water is 20 km/hr and the speed of the current is 5 km/hr, then the time taken by the boat to travel 100 km with the current is :
113 0 5f23ec4e3494c5438aa834dc- 14 hrtrue
- 27 hrfalse
- 32 hrfalse
- 43 hrfalse
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Answer : 1. "4 hr"
A man can row at a speed of $$4{1\over 2}$$km/hr in still water. If he takes 2 times as long to row a distance upstream as to row the same distance downstream, then the speed of stream (in km/hr) is :
43 0 5f23ea55e3005114abcc5c22- 12false
- 22.5false
- 31false
- 41.5true
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Answer : 4. "1.5 "
A man goes downstream with a boat to some destination and returns upstream to his original place in 5 hours. If the speed of the boat in still water and the stream are 10 km/hr and 4 km/hr respectively, the distance of the destination from the starting place is :
49 0 5f23e93f4e7e0d508b591efc- 121 kmtrue
- 225 kmfalse
- 316 kmfalse
- 418 kmfalse
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