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A boat takes 6 hours to cover 36 km downstream and 8 hours to cover 32 km upstream. Then the speed of the stream is?

4km/hr
3km/hr
2km/hr
1km/hr
Explanation:

Speed downstream = $\dfrac{Distance}{Time}$=$\dfrac{36}{6}$=6km/hr

Speed upstream = $\dfrac{Distance}{Time}$=$\dfrac{32}{8}$=4km/hr

Speed of stream =$\dfrac{1}{2}\left(Downstream\:Speed-Upstream\:Speed\right)$

Required speed =$\dfrac{1}{2}\left(6-4\right)km/hr$

=$\dfrac{1}{2}\times 2$

=1km/hr

Additional Questions

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Suppose that a person rows a boat in still water at the speed of 10 km/hr and the water runs at the speed of 4 km/hr. This person travels a certain distance & then returns. If it takes 4 hrs more for him to travel upstream than that of downstream then what will be the distance?

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A man rows downstream at 20 km/hr and rows upstream at 15 km/hr. At what speed he can row in still water?

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A boat takes 6 hours to cover 36 km downstream and 8 hours to cover 32 km upstream. Then the speed of the stream is?

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For a motorboat that covers a certain distance downstream in 2 hours & returns in 3 hours, what would be its speed in still water if the speed of stream is 6 km/hr?

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Consider a boat which moves at the speed of 6 km/hr. If the water runs at the speed of about 4 km/hr, then the boat requires 3 hours to reach a certain place and return. Calculate the distance between that place & boat's initial position.

Answer

Suppose that a person rows a boat in still water at the speed of 10 km/hr and the water runs at the speed of 4 km/hr. This person travels a certain distance & then returns. If it takes 4 hrs more for him to travel upstream than that of downstream then what will be the distance?

Answer
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