4 Replies
@Gyro Gearloose
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.velocity of train a is 20
other is -20, relative velocity of train a wrt train b is 40
total length will be 20, time will be distance/velocity
20/40, 0.5 seconds
ohh okkay
thanks