Quantitative Aptitude :: Boats and Streams Problems And Answers

3. A man rows down stream 40 km and upstream 21 km taking 4 hrs each time. what is the velocity of current?

A. 2.735 Kmph B. 2.375 kmph         
C. 2. 573 kmph D. 2 kmph
Answer & Explanation

Answer: Option B

Explanation:
Man's rate downstream = 40/4 =  10 Kmph
Man's rate upstream = 21/4 = 5.25 Kmph
Velocity of current  = 1/2( 10 - 5.25)
= 2.375 Kmph


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