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If the speed of a boat in still water is 7 km/hr and its speed against the stream is 2.5 km/hr, then what is

If the speed of a boat in still water is 7 km/hr and its speed against the stream is 2.5 km/hr, then what is its speed in the direction of the current? 1. 14.5 km/hr 2. 13 km/hr 3. 14 km/hr 4. 11.5 km/hr None of these 5.

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