A man wants to reach point B on the opposite bank of a river flowing at a speed as shown in
figure. With what minimum speed and in which direction should the man swim relative to water, so that he can reach point B ?
A
North-West B
North-East C
North-West D
North-East
Text Solution
Verified by ExpertsThe correct answer is:
C
Let v be the speed of boatman in still water. Resultant of v and u should be along AB.
Components of 
(absolute velocity of boatman) along x and y directions are,
Further, 
or 
is minimum at,
or 
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