A converging lens of 20cm focal length is arranged coaxially with a diverging lens of focal length 8 cm. They are 8 cm apart. A point object lies on the same side of the converging lens and very far away on the axis. Find the position and nature of the final image of distant object.​

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?