Vaishali covers a certain distance by car at 50 km/h and returns to the starting point through the same route on a bicycle at 10 km/h. If the time taken by her for the whole journey was 2 hours 24 minutes, then what was the total distance that she covered?

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.