 
 <translate> Given the following reasoning and answer, what was the question? Speed downstream = d/t = 75/(2 1/2) = 28 kmph
Speed upstream = d/t = 45/(2 1/2) = 18 kmph
The speed of the stream = (28 - 18)/2 = 5 kmph
 The answer: (C) <ibo> N'iburu n'uche arụmụka na azịza na-esonụ, gịnị bụ ajụjụ ahụ? Speed ala mmiri = d/t = 75/(2 1/2) = 28 kmph Speed elu mmiri = d/t = 45/(2 1/2) = 18 kmph The ọsọ nke iyi = (28 - 18) / 2 = 5 kmph Azịza ya bụ: (C) 