A man can row his boat with the stream at 6 km/h and against the stream in 4 km/h. The man's rate is?A1 kmphB8 kmphC5 kmphD3 kmph
Question
A man can row his boat with the stream at 6 km/h and against the stream in 4 km/h. The man's rate is?A1 kmphB8 kmphC5 kmphD3 kmph
Solution
The speed of the man in still water can be found using the formula:
Speed in still water = 1/2 * (Speed downstream + Speed upstream)
Here, the speed downstream (with the stream) is 6 km/h and the speed upstream (against the stream) is 4 km/h.
So, the speed of the man in still water = 1/2 * (6 km/h + 4 km/h) = 1/2 * 10 km/h = 5 km/h.
So, the answer is C5 kmph.
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