In the following question, two statements are numbered as I and II. On solving these statements, we get quantities I and II respectively. Solve both quantities and choose the correct option.

Statement I. A and B can do a piece of work in 24 hours and 36 hours respectively. If they are working on alternate hours with B starting to work, calculate the number of hours in which the work will be completed.

Statement II. Time taken by a train 250 m long to cross a post is 12.5 seconds. Calculate the time in hours the train will take to cover a distance of 2088 km at the same speed.