railway RPF Constable Mock Test Series 2024 Quantitative Aptitude Speed Time and Distance Average Speed
A person pedals from his house to his office at a speed of x1 km/hr and returns by the same route at a speed of x2 km/hr. His average speed is:
1
\( \frac{x_1+x_2}{2} \)
2
\( \frac{x_1+x_2}{3} \)
3
\( \frac{3}{4}\left(\frac{x_1 x_2}{x_1+x_2}\right) \)
4
\(\frac{2 x_1 \cdot x_2}{x_1+x_2}\)