if a plane can travel 450 miles per hour with the wind and 410 miles per hour against the wind, find the speed of the plane in still air?

Question

isaiah.feynman · Answer

@alekos

alekos · Answer

thanks Isaiah

let Vp be the speed of the plane and Vw speed of the wind

so we have  with the wind   Vp + Vw = 450

and against the wind          Vp - Vw = 410 

just solve fo Vp

isaiah.feynman · Answer

Solve for Vp by adding the two equations that gives you...2Vp=860. Divide both sides by 2 and you get Vp = 430.

isaiah.feynman · Answer

Oh gosh my first comment is absolutely pointless I read the question wrongly!

alekos · Answer

don't worry about it. its one of those relative velocity questions that you see in physics

alekos · Answer

you happy with that Steven?