 <translate> Speed of the boat in still water = (60+80)/2 = 70 kmph. Speed of the stream = (80-60)/2 = 10 kmph Final answer: (A). <yor> Iyara ọkọ oju omi ni omi ti o dakẹ = (60+80)/2 = 70 kmph. Ìyára tí ìsun omi ń yára yára = (80-60)/2 = 10 kmph Ìdáhùn tí ó kẹ́yìn: (A). 