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Ask community Community Discussion Question: A man can swim with a speed of 4.0kph in still water. How long does he take to cross a river 1.0 km
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[Post New] 2 Jul 2009 22:24:19 IST
   Subject: A man can swim with a speed of 4.0kph in still water. How long does he take to cross a river 1.0
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abhishek gambhir (0)

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A man can swim with a speed of 4.0kph in still water. How long does he take to cross a river 1.0 km wide if the river flows steadily at 3 kph
    

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[Post New] 2 Jul 2009 22:29:56 IST
   Subject: A man can swim with a speed of 4.0kph in still water. How long does he take to cross a river 1.0 km
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swapneal......... (677)

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[Post New] 3 Jul 2009 15:40:15 IST
   Subject: A man can swim with a speed of 4.0kph in still water. How long does he take to cross a river 1.0
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Anirudh Kumar (295)

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unless the direction of motion of the swimmer is specified or some condition is given . thsi question does not have a single answer .  
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[Post New] 3 Jul 2009 15:46:05 IST
   Subject: A man can swim with a speed of 4.0kph in still water. How long does he take to cross a river 1.0 km
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Abhishek S (464)

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Assuming that the man is swimming perpendicular to the bank.Vector speed - 5 km/h. (vector sum of 4 and 3)Distance is 1 km.therefore time will be 12 minutes.
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[Post New] 3 Jul 2009 15:46:31 IST
   Subject: A man can swim with a speed of 4.0kph in still water. How long does he take to cross a river 1.0
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Abhishek S (464)

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Assuming that the man is swimming perpendicular to the bank.
Vector speed - 5 km/h. (vector sum of 4 and 3)
Distance is 1 km.

therefore time will be 12 minutes.
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