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Question 37
A boat takes 12 hours to go downstream and 24 hours to return while covering a certain distance. What is the time taken by the boat to cover the same distance in still water?
Solution
if t1 and t2 are the upstream and downstream times. Then time taken in still water is given byÂ
$$ \frac{2 \times t1 \times t2}{t1 + t2} = \frac{2 \times 12 \times 24}{36} = 16hrs $$
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