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- If Rahul rows 15 km upstream in 3 hours and 21 km downstream in 3 hours,then the speed of the stream is
Question 1:
If Rahul rows 15 km upstream in 3 hours and 21 km downstream in 3 hours,then the speed of the stream is
A. 5 km/hr
B. 4 km/hr
C. 2 km/hr
D. 1 km/hr
Feedback Rate upstream = (15/3) kmph
Rate downstream (21/3) kmph = 7 kmph.
Speed of stream (1/2)(7 - 5)kmph = 1 kmph
Rate downstream (21/3) kmph = 7 kmph.
Speed of stream (1/2)(7 - 5)kmph = 1 kmph
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