Question 395743
  <pre><font size = 3 color = "indigo"><b>
Hi
D = r*t  OR r = D/t
Note 3hr 20 min = 3 1/3 hr = 10/3hr
Great Set Up using the p + w and p - w
 p + w = 1000mi/10/3hr
 p - w = 1000mi/4hr
 p + w = 300mph
 p - w = 250mph
   2p = 550mph
    p = 275mph, planes' speed
 275 + w = 300
       w = 25mph, wind speed

CHECKING our Answer
  275mph + 25mph = 300mph