calculate jet plane doing 1 revolution around the world

details:

• say an jet plane starts at a point over earth (any point)

• flies a "straight line" around the world (back to the same point)

• has a constant realistic velocity (no acceleration)

• the initial velocity (from starting point) is the same as the constant velocity

• assume the jet plane is at a "perfect altitude" where it doesn't have to increase or decrease its vertical position.

what I want to find:

• total distance

• delta t

• velocity , that you used/found (please use a realistic velocity)

Im really curious about this but have homework to do / exams to study for

I don't want to spend time checking the calculations or finding normal/realistic jet speeds. etc

use any "large-ish" unit of measurement (for all aspects of the formula)