Question

Two train 75 km apart approach each other on parallel tracks, each moving at

Answer 1

Answer:

The correct solution is "37.5 km".

Explanation:

Given:

Distance between the trains,  

d = 75 km

Speed of each train,

= 15 km/h

The relative speed will be:

= $15 + (-15)$

= $30 \ km/h$

The speed of the bird,

V = 15 km/h

Now,

The time taken to meet will be:

$t=\frac{Distance}{Relative \ speed}$

  $=\frac{75}{30}$

  $=2.5 \ h$

hence,

The distance travelled by the bird in 2.5 h will be:

⇒ $D = V t$

        $=15\times 2.5$

        $=37.5 \ km$