Question 1057765
Let s be the speed of the slower plane. Then the faster plane flies at s+50. So:
1400/s - 3=1000/(s+50)
1400(s+50)- 3s²-150s=1000s
3s²-250s-70000=0
(3s+ 350)(s-200)=0
s=200 or -350/3
The slower plane flies at 200 kph; the faster one flies 250 kph. &#9786;&#9786;&#9786;&#9786;