Teaching EMRS JSA (Junior Secretariat Assistant) Mock Test Series 2023 Quantitative Aptitude Speed Time and Distance Average Speed
If a man travels a certain distance with the speed of x km/hour and the same distance with the speed of y m/second, then the average speed of whole journey is:
1
\(\rm \frac{2 x y}{x+y} m / second \)
2
\(\rm \frac{5 x y}{9(1000 x+y)} {m} / { second } \)
3
\(\rm \frac{5 x y}{9(x+y)} {m} / { hour }\)
4
None of these