It takes 4 hours for a motorboat to travel downstream from X to Y. To return upstream from Y to X it takes the motorboat 6 hours. How many hours would it take a wooden log to be carried from X to Y by the current, assuming it is unhindered by any obstacles?
[Assume that the current flows at a constant rate, and that the motorboat moves at a constant speed relative to the water.]
Select one option, then click Submit.
5
10
12
20
24
Select an option, then submit.
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