A man can row a boat in still water at a speed V. If the width of river is d and water is flowing due south at a speed V/2; then find the drift of the boat if the man rows the boat making an angle of 60o with respect to north.
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a
zero
b
d4
c
d23
d
3d4
answer is A.
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Detailed Solution
Time taken by the boat to cross the river, t=dVsin60o=2d3V∴ Drift produced=(Vcos60o−V2)×t=zero
A man can row a boat in still water at a speed V. If the width of river is d and water is flowing due south at a speed V/2; then find the drift of the boat if the man rows the boat making an angle of 60o with respect to north.