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No scam will be given brain list ​

Answer»

-STEP explanation:1) Speed of the boat ,B= 5km/hrspeed of the current,S = x km/hr upstream = Boat speed - current speed U = B - S = 5-x km/hr Downstream= Boat speed + current speed D = B + S = 5+x km/r 2) LET's take 50 RS note as X ,100 rs note as Y, 50X + 100Y = 800



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