Two trains are moving with equal speed in opposite direction along two parallel railway tracks. If t

Question

Two trains are moving with equal speed in opposite direction along two parallel railway tracks. If the wind is blowing with speed $u$ along the track so that the relative velocities of the trains with respect to the wind are in the ratio 1:2, then the speed of each train must be\

Professor PC Thomas Classes · Answer

Let the speed of each train be $x$.\ $	herefore \frac{\mathrm{x}-\mathrm{u}}{\mathrm{x}+\mathrm{u}}=\frac{1}{2}$ or $2 \mathrm{x}-2 \mathrm{u}=\mathrm{x}+\mathrm{u}$\ or $x=3 u$.\