A boat moves downstream at the rate of one km in 5 minutes and upstream at the rate of 4 km an hour ...........

Quantitative Aptitude ( CCS) Boats and Streams

A boat moves downstream at the rate of one km in 5 minutes and upstream at the rate of 4 km an hour. what is the velocity of the current?

5 km/hr

3 km/hr

4 km/hr

None of these

Speed downstream = 1/(5/60)=12 km/hr
Speed upstream =4/1 = 4 km/hr
velocity of the current =1/2(12−4)=4 km/hr
?Hence, option 3 is the correct answer.

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