A plane journey starts at 8:00 am from a point at 32°E longitude and ends at 9:12 am at a point at 40°W longitude. Calculate the time taken and the change in longitude.

The plane started at 8:00 am and arrived at 9:12 am.
Time taken $= 9 \text{ hours } 12 \text{ minutes} - 8 \text{ hours } 0 \text{ minutes} = 1 \text{ hour } 12 \text{ minutes}$.
Convert minutes to hours: $12 \text{ minutes} = \frac{12}{60} \text{ hours} = 0.2 \text{ hours}$.
Total time $T = 1 + 0.2 = 1.2$ hours.

Point A is at $32^\circ$E and Point B is at $40^\circ$W. Since they are on opposite sides of the Prime Meridian, the difference in longitude is the sum of their absolute longitudes