A) 10 kmph
B) 16 kmph
C) 12.2 kmph
D) 9.5 kmph
E) 11.5 kmph
Correct Answer: E
Solution :
Let the speed of the man in still water be x kmph. Downstream speed = (x + 3.5) kmph Upstream Speed == (x - 3.e) kmph Now, \[4\times (x+3.5)=(x-3.5)\times 7.5\] or, \[4x+14=7.5x-26.25\] or\[3.5x=40.25\] \[\therefore x=\frac{40.25}{3.5}=11.5kmph\]You need to login to perform this action.
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