270 metres long train running at the speed of 120 kmph crosses another train running in opposite direction at the speed of 80 kmph in 9 seconds. What is the length of the other train?
Answer with explanationAnswer: Option A
Relative speed = (120 + 80) km/hr
Let the length of the other train be x metres.
Then,(x + 270)/9=500/9
x + 270 = 500
x = 230.