plz...answer fast xam tomorrow

Asked by Sonal13 | 15th Jan, 2010, 02:43: PM

Expert Answer:

Let the speed of river current be x km/h

speed upstream =1-x

speed downstream  =1+x

12/1-x+12/1-x = 11/4

12(2/1-x2) = 11/4

Solving this we get x2 = -negative which is not possible  so check the question and revert



Answered by  | 15th Jan, 2010, 03:02: PM

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