<PRE><B>Question 38344</B>
from 8am to 11am the time difference is 3 hours.
The speed of one plane is 75+x
The speed of another plane is x
Equation:
3(x+75+x)=2175
6x=2175-225
6x=1950
x=325
325+75=400
Hence, the speed of the two planes are 325mph and 400mph.
Paul.</PRE>