Question

Two station a and b are at a distance of 120 km. train x started from a towards b at a speed of 60kmp and after 30 minutes, train y started from b away from a at a speed of 30

Answer 1

Train x = 60 km/h

Train y = 30km /h

Train x begins first at 60 km/h.

In 1/2 hrs the distance covered by train x is :

1/2 × 60 = 30km

Let the total distance be D.

The distance remaining is (D - 30)km

Let the relative distance = 30km

Relative speed = 60 + 30 = 90 km/h

Time taken for them to meet is :

30/90 = 1/3 hrs

They meet after 1/3 hrs.

The total distance between a and b is :

(60 × 1/3  +  30)  + (30 × 1/3)

(20 + 30) + 10  = 60 km