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Boats and Streams

Q1:

A man can row at 5 kmph in still water. If the velocity of current is 1 kmph and it takes him 1 hour to row to a place and come back, how far is the place?

A 2.4 km

B 2.5 km

C 3 km

D 3.6 km

ANS:A - 2.4 km

Speed downstream = (5 + 1) kmph = 6 kmph. Speed upstream = (5 - 1) kmph = 4 kmph. Let the required distance be x km.

Then, x + x = 1
6 4
 2x + 3x = 12  5x = 12  x = 2.4 km.



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