Question

the distance between two stations a and b is 100 km. a train leaves a towards b at an average speed of 80 km/hr. after half an hour, another train leaves b towards a at an average speed of 100 km/hr. the distance of the point where the two trains meet, from a is:​

Answer 1

Explanation:

orrect Option: A

Let the required distance be x km.

Then, ( x/80 ) - ( 220 - x ) / 100 = 1/2

⇒ 5x - 4( 220 - x ) = 200

⇒ 9x = 1080

⇒ x = 120 km

∴ Required distance = 120 km