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A man can row 4.5 km/hr in still water a...

A man can row 4.5 km/hr in still water and he finds that it takes him twice as long to row up as to row down the river. Find the rate of the stream.

A

2 km/hr

B

1.5 km/hr

C

2.5 km/hr

D

1.75 km/hr

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The correct Answer is:
B
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