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

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A shopkeeper expects a gain of 22.5% on his cost price. If in a week, his sale was of TK. 392, what was his profit?

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An amount of money at simple interest amounts to TK. 815 in 3 years and to TK> 854 in 4 years. The amount is --

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