Question 678995
let rate of wind be x m/h

speed against wind 550-x m/h----------- 2000 miles
speed with wind = 550+x m/h------------2400 miles

time = d/r

time against = time with

2000/(550-x)= 2400/(550+x)
2000(550+x)=2400(550-x)
1100000+2000x=1320000-2400x

2400x+2000x=1320000-1100000

4400x=220000
x= 50 m/h