railway RPF Constable Mock Test Series 2024 Quantitative Aptitude Speed Time and Distance Boat and River
Speed in still water is x km/h and that of the stream is y km/h. A man rows a certain distance up and down the stream. What is the average speed for the journey?
1
\(\rm \frac{x^2+y^2}{x y}\) km/h
2
\(\rm \frac{x^2-y^2}{2 x y}\) km/h
3
\(\rm \frac{x^2+y^2}{x} \) km/h
4
\(\rm \frac{{x}^2-{y}^2}{{x}}\) km/h