A man can row at 5 kmph in still water. If the velocity of current is 1 kmph and it takes him 1 hour to row to a place and come back, how far is the place?

Answer: Option A

Speed downstream = (5 + 1) kmph = 6 kmph
Speed upstream = (5 - 1) kmph = 4 kmph
Let the required distance be x km
Then,
$$\frac{x}{6}+\frac{x}{4}$$ = 1
⇒ 2x + 3x = 12
⇒ 5x = 12
⇒ x = 2.4 km