 
 <translate> Speed downstream = 50 + 20 = 70 kmph
Speed upstream = 50 - 20 = 30 kmph
Therefore, the answer is (A). <hau> Saurin saukar da ruwa = 50 + 20 = 70 kmph Saurin hawan sama = 50 - 20 = 30 kmph Saboda haka, amsar ita ce (A). 