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A man can row at a speed of 8 km/hr in still water to a certain upstream point and back to the starting point in a river which flows at 4 km/hr. Find average speed for total journey.
5Q:
A man can row at a speed of 8 km/hr in still water to a certain upstream point and back to the starting point in a river which flows at 4 km/hr. Find average speed for total journey.
- 15 km/hrfalse
- 26.5 km/hrfalse
- 34.5 km/hrfalse
- 47 km/hrfalse
- 56 km/hrtrue
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