6th After crossing, the time taken by each train to reach their destination is in the ratio 16 : 25. The speed of the second train is 24 kmph. Formula used: After crossing each other, if time taken by 2 trains is T1 and T2 respectively then, S2/S1 = √(T1/T2), here, S1 and S2 are speeds of first and second train respectively Calculation: We have, T1 = 16x, T2 = 25x, S1 = 24 kmph ⇒