SOLUTION: if a boat travels at a speed of 5 kilometres per an hour crosses a river of width 1 kilometre in 15 minutes , then find the speed of the river

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Question 959919: if a boat travels at a speed of 5 kilometres per an hour crosses a river of width 1 kilometre in 15 minutes , then find the speed of the river
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
if a boat travels at a speed of 5 kilometres per an hour crosses a river of width 1 kilometre in 15 minutes , then find the speed of the river
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Not clear.
Calls for assumptions.