Question

Two trains starting at the same time from two stations 200 km apart and going in opposite directions cross each other at a distance of 110 km from one of the stations. What is the ratio of their speeds?

Answer 1

It is not mentioned whether the trains are moving with constant velocity or with some acceleration.

If you consider them to be moving with constant speeds:

$displacement = speed*time$

take the speeds of the trains as v1 and v2

using the formula,

110 = v1 x t

and 90 = v2 x t

where t is the time taken by the trains to travel that displacement, which is same for both the trains.

now u can divide both the equations to get the ratio

$v_1/v_2 = 11/9$

Answer 2

Answer:

11:9

Explanation:

Given  distance 200km as total

cross each other at 110km

the remaining is 200-110=90

So,110:90   =>11:9