Train P crosses a pole in 20 seconds, and also crosses train Q (which is running in the same direction) in 1 minute 50 seconds. If the speed of train Q is 25% more than that of P and the length of train Q is 150 m, find the length of train P.

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.