A river is flowing with velocity $5\ km/hr$ as shown in the figure. A boat starts from $A$ and reaches the other bank by covering shortest possible distance . Velocity of boat in still water is $3\ km/ hr$. The distance boat covers is ......... $m$
A river is flowing with velocity $5\ km/hr$ as shown in the figure. A boat starts from $A$ and reaches the other bank by covering shortest possible distance . Velocity of boat in still water is $3\ km/ hr$. The distance boat covers is ......... $m$
- A
$500$
- B
$400 \sqrt 2 $
- C
$300 \sqrt 2$
- D
$600$
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