Two trains each of length 50 m are approaching each other on parallel rails. Their velocities are 10 m / sec and 15 m / sec. They will cross each other (in sec) ?

Question

Two trains each of length 50 m are approaching each other on parallel rails. Their velocities are 10 m / sec and 15 m / sec. They will cross each other (in sec) ? (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

The effective distance travel by each train =100 m and the relative velocities =(10+15)=25 m / s ∴ time to cross each other =(100/25)=4 sec

Q. Two trains each of length $50 m$ are approaching each other on parallel rails. Their velocities are $10 m / sec$ and $15 m / sec$ . They will cross each other (in $sec$ ) ?

The effective distance travel by each train $= 100 m$
and the relative velocities $= (10 + 15) = 25 m / s$
$∴$ time to cross each other $= \frac{100}{25} = 4 sec$

Q. Two trains each of length 50m are approaching each other on parallel rails. Their velocities are 10m/sec and 15m/sec. They will cross each other (in sec) ?

The effective distance travel by each train =100m and the relative velocities =(10+15)=25m/s ∴ time to cross each other =25100​=4sec

Q. Two trains each of length $50 m$ are approaching each other on parallel rails. Their velocities are $10 m / sec$ and $15 m / sec$ . They will cross each other (in $sec$ ) ?

The effective distance travel by each train $= 100 m$
and the relative velocities $= (10 + 15) = 25 m / s$
$∴$ time to cross each other $= \frac{100}{25} = 4 sec$