If the speed of a boat in downstream is 22 km/hr and in upstream is 10 km/hr. Then the speed of the water stream is?

6 km/hr

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6 m/s

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12 km/hr

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12 m/s

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Solution

The correct option is A
6 km/hr

We have seen known that, if the speed of a boat in downstream is U and in upstream is V. Then the speed of the boat in still water is:- $\frac{U + V}{2}$

And the speed of stream will be:- $\frac{U - V}{2}$

So, here, speed of the water stream = $\frac{22 - 10}{2} = 6 k m / h r$

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If the speed of a boat in downstream is 22 km/hr and in upstream is 10 km/hr. Then the speed of the water stream is?

The correct option is A 6 km/hr We have seen known that, if the speed of a boat in downstream is U and in upstream is V. Then the speed of the boat in still water is:- U + V2 And the speed of stream will be:- U − V2 So, here, speed of the water stream = 22 − 102 = 6 km/hr