A fish’s speed with the current is 10 km/hr and the speed of the current is 4 km/hr. The fish’s speed against the current is:

2 km/hr

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2.5 km/hr

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3 km/hr

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3.5 km/hr

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Solution

The correct option is A 2 km/hr
Speed of the fish with the current = 10 km/hr
Speed of the current = 4 km/hr
Therefore, speed of the fish in still water = 10 – 4 = 6 km/hr
Speed of the man against the current = 6 – 4 = 2 km/hr

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A man's speed with the current is 15 km/hr and the speed of the current is 2.5 km/hr. The man's speed against the current is

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\frac{S}{3}

\frac{2 S}{3}

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