 
 <translate> Speed ala mmiri = d/t = 85/(2 1/2) = 34 kmph Speed elu mmiri = d/t = 45/(2 1/2) = 18 kmph Ọsọ nke iyi = (34 - 18) / 2 = 8 kmph Azịza ikpeazụ: (D). <yor> 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). 