Two trains of lengths 300 m and 200 m travel in the same direction and cross each other in 20 seconds. If the faster train's speed is 108 km/h, what is the speed of the slower train in km/h?

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.