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A man can swim with a …

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A man can swim with a speed of 4km per hour in still water. How long does he take to cross a river of 1 km width given speed of river is 3 km per hour?? 

  • 1 answers

Sahdev Sharma 6 years, 8 months ago

Speed of the man, vm = 4 km/h

Width of the river = 1 km

Time taken to cross the river = {tex}Width\ of \ the \ river \over Speed \ of \ the \ river {/tex}{tex}= { 1\over 4} h ={ 1 × 60 \over 4 }= 15\ min{/tex}

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