Maths
posted by Tosin .
An aeroplane leaves a point on latitude 54degree south at 10 a.m. It flies due south at a steady speed of 800km/h.
(a) what is its latitude at midpoint?
(b) at what time does it pass over the south pole?

circumference of earth is roughly 40000km
latitude 54 south is 36 degrees from pole.
36/360 * 40000 = 4000 km
4000/800 = 5 hours to the pole.