 
 <translate> Saurin saukar da ruwa = d/t = 90/(2 1/2) = 36 kmph Saurin hawan sama = d/t = 45/(2 1/2) = 18 kmph Saurin rafin = (36 - 18) / 2 = 9 kmph Saboda haka, amsar ita ce (A). <yor> Iyara ìsàlẹ̀ odò = d/t = 90/(2 1/2) = 36 kmph Iyara ti o wa ni oke = d/t = 45/(2 1/2) = 18 kmph Iyara ti odò = (36 - 18)/2 = 9 kmph Nítorí náà, ìdáhùn náà ni (A). 