Train X is travelling at 126 km/h and takes 24 seconds to cross Train Y when moving in opposite directions, whereas it takes 144 seconds to overtake Train Y when moving in the same direction. If the length of Train Y is 400 meters, find the length of Train X.

Ramesh covers 56 part of the total distance by bus and the remaining 36 km by car. What is the total distance of his journey?

A person covers a distance of L km in 12 hours. If he increases his speed by 10 m/s, he covers the same distance in 8 hours. Which of the following statements is/are correct? I. The value of L is 760 km. II. The original speed of the person is 72 km/h.