arithmetic - a train having a length of 270 meter is running at the speed of 120 kmph it crosses another train running in opposite direction at the speed of 80 kmph in 9 seconds what is the length of the other train - skillgun

Relative speed = 120+80 = 200 kmph = 200×10/36 m/s = 500/9 m/s
time = 9s
Total distance covered = 270 + x where x is the length of other train
(270+x)/9 = 500/9
=> 270+x = 500
=> x = 500-270 = 230 meter