<PRE><B>Question 1141378</B>
 A commercial airliner can travel 750 miles in the same amount of time that it takes a private plane to travel 300 miles.
 The speed of the airliner is 60 mph more than twice the speed of the private plane.
:
let s = the speed of the private plane
then
(2s+60) = the speed of the commercial airliner
:
Write a time equation; time = dist/speed
{{{300/s}}} = {{{750/((2s+60))}}}
cross multiply
750s = 300(2s+60)
750s = 600s + 18000
750s - 600s = 18000
150s = 18000
s = 18000/150
s = 120 mph is the speed of the private plane
then
2(120) + 60 = 300 mph is speed of the commercial airliner
:
:
Check this find the actual time for each
300/120 = 2.5 hrs
750/300 = 2.5 hrs, confirms our solutions


 Find the speed of each aircraft</PRE>