 
<translate> Saurin jirgin ruwa a cikin ruwa mai nutsuwa = (100 + 112) / 2 = 106 kmph. Saurin rafin = (100-112) / 2 = 6 kmph Saboda haka amsar karshe ita ce (B). <eng> Speed of the boat in still water = (100+112)/2 = 106 kmph. Speed of the stream = (100-112)/2 = 6 kmph So the final answer is (B). 