 
 <translate> Iyara ìsàlẹ̀ odò = d/t = 85/(2 1/2) = 34 kmph Iyara ti o wa ni oke = d/t = 45/(2 1/2) = 18 kmph Ìyára tí ìsun omi ń yára sí = (34 - 18) / 2 = 8 kmph Ìdáhùn tí ó kẹ́yìn: (D). <hau> Saurin saukar da ruwa = d/t = 85/(2 1/2) = 34 kmph Saurin hawan sama = d/t = 45/(2 1/2) = 18 kmph Saurin rafin = (34 - 18) / 2 = 8 kmph Amsar karshe: (D). 