2 airplanes with different speeds

Mar 2010
14
0
2 planes leave an airport at the same time in opposite directions. One plane is slower by 150 mph. After 3 hours they are 2250 miles apart. What are their speeds?
x= plane 1
x-150=plane 2
time= 3 hrs
distance =2250 miles
rate of x=450
[3(x-150)] + 3x=2250
 
Last edited:

skeeter

MHF Helper
Jun 2008
16,217
6,765
North Texas
2 planes leave an airport at the same time in opposite directions. One plane is slower by 150 mph. After 3 hours they are 2250 miles apart. What are their speeds?
let v = speed of the faster plane

(v)(3) + (v-150)(3) = 2250

solve for v