Train-A, 150 metre long and running at 15 m/second overtakes train B running at 10m/ second in a direction same as that of train-A in 72 second (from the moment both trains meet). What is train B's length? (in metre)
A vessel contains a mixture of 'x' litre milk and '25' litre water in the respective ratio of 24 : 5. If 29 litre mixture is taken out and 4 litre water is added to it, what will be the resultant respective ratio between milk and water?