A man can swim at 4 km h⁻¹ in still water. How long does he take to cross a river 1 km wide if the river flows at 3 km h⁻¹ and he swims normal to the river current?
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A man can swim at 4 km h⁻¹ in still water. How long does he take to cross a river 1 km wide if the river flows at 3 km h⁻¹ and he swims normal to the river current?
Options