fli plane tu & from
idea is a komponent av the wind go in same direkshun as plane iwen it go 1 wae
Then wind is ginst plane wen it go bak tu start point
Naturally, this assume wind stae same for both trips.
if plane speed=p & wind speed=w
time1=distans / (p+w)
time2=distans / (p-w)
7 ours=time1+time2