question is hopefully simple, i am someone who sucks at maths who needs to do a maths equation, yipee!

im trying to do a tween for a plane, but don’t want to give myself a headache doing trial and error, so i want to automate the process and make the tweens time change to reflect a set speed and the distance itd take to get to its goal

i dont really know if i need to explain anything more, i dont even know if this is the right category to post under, i just need solutions :')