A and B are running in the same direction at speeds of 9 km/h and 3 km/h, respectively, on a circular track of length 27 km. After how many hours will they meet again at the starting point?

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.