<PRE><B>Question 231242</B>
D=RT or T=D/R
T=400/(R+22)
T=300/(R-22)
400/(R+22)=300/(R-22)
400(R-22)=300(R+22)
400R-8,800=300R+6,600
400R-100R=8,800+6,600
100R=15,400
R=15,400/100
R=154 MPH FOR THE PLANE IN STILL AIR.
PR00F:
400/(154+22)=300/(154-22)
400/176=300/132
400*132=300*176
52,800=52,800
</PRE>