A: If the speed of the boat in still water is 42 kmph, and the time taken by the man to row the same distance downstream is 42 / 2 = 21 / 2 = 14 sec. The speed of the stream is 14 / 2 = 7 kmph. The answer is (C).
Answer the following multiple choice question with options (a), (b), (c), (d), (e) by reasoning step-by-step.
Q:The time taken by a man to row his boat upstream is twice the time taken by him to row the same distance downstream. If the speed of the boat in still water is 42 kmph, find the speed of the stream? Answer Choices: A)77 B)88 C)14 D)12 E)17