Answer:
435 miles per hour, 515 miles per hour
Step-by-step explanation:
Let us assume that plane A is traveling at 'x' miles per hour, then plane B is traveling at 'x+80' miles per hour. As the question says that one of them traveled 80 miles per hour faster than other.
After 4 hours they were 3800 miles apart.
We know that,
[tex]t= \frac{distance}{speed}[/tex]
Since two planes are traveling in opposite directions, so we will add their speed.
Putting the values in the equation we get,
[tex]4= \frac{3800}{x+(x+80)}[/tex]
Now, solving for 'x'
[tex]4(x+(x+80))=3800[/tex]
[tex]4x+4x+320=3800[/tex]
[tex]8x= 3800-320[/tex]
[tex]8x=3480[/tex]
[tex]x=\frac{3480}{8} =435[/tex]
So the rate of plane A is 435 miles per hour and the rate of plane B is (435+80 = 515) miles per hour.
Answer:
The first plane is 435mph and the second is 515mph
Step-by-step explanation:
I got it from somewhere else
If the planes mph's are the other way around, sorry!
