Question

an airplane flew for 5 hours with a tail wind of 25km/h. the return flight against the same wind took them 5.5 hours. find the speed of the airplane in still air!!!!

Answer 1

let the speed is x
so in first flight the resultant velocity=x+25
in return x-25
the distance is (x+25)*5=(x-25)*5.5
.5x=25*5+25*5.5
x=525km/h