Quantitative Aptitude Ques 2471

Question: A man can row at 5 km/h in still water. If the velocity of current is 1 km/h and it takes him 1 h to row to a place and comes back. How far is the place?

Options:

A) 2.5 km

B) 3 km

C) 2.4 km

D) 3.6 km

Show Answer

Answer:

Correct Answer: C

Solution:

  • Let the distance be x km. Speed upstream $ =5-1=4km/h $ Speed downstream $ =5+1=6km/h $ According to the question, $ \frac{x}{6}+\frac{x}{4}=1 $
    $ \Rightarrow $ $ 2x+3x=12 $

$ \Rightarrow $ $ 5x=12,\Rightarrow x=2.4,km $