Question 1027345
An airliner flies against the wind on one leg of its round trip in 5.5 hours. 
let speed of plane in still air be x
speed against wind = x-16
time = 5.5 hours
It flies back to its starting point, with the wind in 5 hours.
speed with wind = x+16
time = 5 hours

distance is same

d = rt



(x-16)*5.5 = (x+16)*5

(x-16)*11/2 = (x+16)*5

11x-176 = 10x+160

x= 176+160
x=336 mph