Posted by Kelsey on Wednesday, May 14, 2008 at 2:00am.
I need help with this problem:
Two planes start from Los Angeles International Airport and fly in opposite directions. The second plane starts ½ hour after the first plane, but its speed is 80 kilometers per hour faster. Find the airspeed of each plane if 2 hours after the first plane departs the planes are 3200 kilometers apart.

Math  bobpursley, Wednesday, May 14, 2008 at 3:28am
distance slow plane=vt
distance fast plane=.5*(v+80)t +(v+80)t
3200=sum of the two distances, or
3200=v*2+.t(v+80)*2 + (v+80)*2
solve for v, then for the faster plane, its speed is v+80

Math  bobpursley, Wednesday, May 14, 2008 at 3:39am
40 times five is 200
Answer This Question
Related Questions
 Math  A plane leaves Chicago headed for Los Angeles at 520 mph. One hour later...
 Math  Two small planes start from the same point and fly in the opposite ...
 math  A plane leaves Chicago headed for Los Angeles at 520 mph. One hour later...
 math  A plane leaves Chicago headed for Los Angeles at 520 mph. One hour later...
 math  A plane leaves Chicago headed for Los Angeles at 520 mph. One hour later...
 algebra  Two planes left simultaneously from the same airport and headed in the...
 Trig  Two planes take off at the same time from an airport. The first plane is ...
 Math  Plane A leaves the airport. One hour later, Plane B leaves the same ...
 Math  Two airplanes leave St. Louis at the same time and fly in opposite ...
 Math  Two airplanes leave St. Louis at the same time and fly in opposite ...
More Related Questions