Q 11-02-077JEE MainJEE Main 2023 (25 Jan, Shift 1)Easy
A car travels a distance of $x$ with speed $v_1$ and then same distance $x$ with speed $v_2$ in the same direction. The average speed of the car is
Answer: (D) $\dfrac{2v_1v_2}{v_1+v_2}$
$$\bar v=\frac{2x}{\frac{x}{v_1}+\frac{x}{v_2}}=\frac{2v_1v_2}{v_1+v_2}$$
Solution by Sreeraj P, M.Sc Physics