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?
A. 2.4 km
B. 2.5 km
C. 3 km
D. 3.6 km
E. None of these
Answer: Option A
Solution(By Examveda Team)
Speed downstream = (5 + 1) kmph = 6 kmphSpeed 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
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