A man drives 300 km from A to B in 3 hours 20 minutes. He returns the same distance in 4 hours 10 minutes. The average speed from A to B exceeds the average speed for the entire trip by how many km/hr?

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.