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Multiple Choice Questions

A man can row at 8 kmph in still water If the velocity of current is 2 kmph and it takes him 2 hours...........

Quantitative Aptitude(IBPS RRB PO) Boats and Streams

A man can row at 8 kmph in still water. If the velocity of current is 2 kmph and it takes him 2 hours to row to a place and come back, how far is the place?

7.5 km

8 km

8.5 km

9 km

None of these

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Explanation:

Speed downstream = 8 + 2 = 10 kmph

Speed upstream = 8 – 2 = 6 kmph

Let the required distance be d km.

Then,d/10 +d/6= 2 ;

6d + 10d = 120

16d = 120 ;

d = 7.5 km

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A man can row at 8 kmph in still water If the velocity of current is 2 kmph and it takes him 2 hours...........

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