Teaching KVS Junior Secretariat Assistant (LDC) Mock Test 2022 Quantitative Aptitude Speed Time and Distance Average Speed
A student takes a bus which runs at x km/hr to reach school. He returns home walking at y km/hr. The average speed (in km/hr) is
1
\(\frac{{x + y}}{2}\)
2
xy
3
\(\frac{{2xy}}{{x + y}}\)
4
\(\frac{{2xy}}{{x - y}}\)