Multiple Choice Questions

If Rohan rows 15 km upstream in 3 hours and 21 km downstream in 3 hours then the speed of the ...........

Quantitative Aptitude and Numerical Ability (DRDO) (Phase-i and II) Boats and Streams

If Rohan rows 15 km upstream in 3 hours and 21 km downstream in 3 hours, then the speed of the stream is

8 km/h

3 km/h

1 km/h

2 km/h

Rate upstream = (15/3) kmph
Rate downstream (21/3) kmph = 7 kmph.
Speed of stream (1/2)(7 - 5)kmph = 1 kmph

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