A: The total distance covered by the boat in 30 hours is 72/6 = 36 km. Time taken to cover the remaining distance of 72 km is 13 hours. The answer is (B).
Answer the following multiple choice question with options (a), (b), (c), (d), (e) by reasoning step-by-step.
Q:A man can row a boat at 20 kmph in still water. If the speed of the stream is 6 kmph, what is the time taken to row a distance of 72 km downstream? Answer Choices: A)30/16 hours B)36/13 hours C)30/73 hours D)30/13 hours E)50/13 hours